Carbon dioxide. Medical search. Frequent questions

Carbon dioxide is 53% more dense than dry air, but is long lived and thoroughly mixes in the atmosphere. (wikipedia.org)
About half of excess CO2 emissions to the atmosphere are absorbed by land and ocean carbon sinks. (wikipedia.org)
This article is about removing carbon dioxide from the atmosphere. (wikipedia.org)
Carbon dioxide removal ( CDR ), also known as carbon removal , greenhouse gas removal ( GGR ) or negative emissions , is a process in which carbon dioxide gas (CO 2 ) is removed from the atmosphere by deliberate human activities and durably stored in geological, terrestrial, or ocean reservoirs, or in products. (wikipedia.org)
: 8 However, there is significant uncertainty around this number because there is no established or accurate method of quantifying the amount of carbon removed from the atmosphere. (wikipedia.org)
[12] Technologies have been proposed for removing non-CO 2 greenhouse gases such as methane from the atmosphere, [13] but only carbon dioxide is currently feasible to remove at scale. (wikipedia.org)
[15] When used to sequester the carbon from a gas-fired power plant, CCS reduces emissions from continued use of the point source, but does not reduce the amount of carbon dioxide already in the atmosphere . (wikipedia.org)
Right now people are really interested in the question of 'sinks,' or systems that take carbon dioxide out of the atmosphere. (sciencedaily.com)
We take a trip around North America to explore other ways of keeping carbon out of the atmosphere. (kosu.org)
Not all greenhouse gases warm the atmosphere equally, some gases (such as methane) have a greater global warming potential, or warming effect, than carbon dioxide. (un-redd.org)
However, those temporary reductions have not been enough to make a significant dent in the overall trajectory of carbon-dioxide accumulations in the atmosphere. (latimes.com)
Humans emit roughly 40 billion metric tons of carbon dioxide annually, pollution that can persist in the atmosphere and oceans for thousands of years, said Pieter Tans, a senior scientist with NOAA's Global Monitoring Laboratory. (latimes.com)
I feel myself qualified, on the basis of what I have learned, to say, from the point of view of Physical Chemistry, i.e. rigorous science of the if A then B type, that global warming as the result of carbon dioxide in the atmosphere is totally undeniable and that the extent of the forcing is beyond doubt close to what the climatologists are saying it is. (skepticalscience.com)
Kondratiev, K. Y. and Niilisk, H. I.: 1960, 'On the Question of Carbon Dioxide Heat Radiation in the Atmosphere', Geofis. (springer.com)
As I have pointed out frequently (Gray 1998) background carbon dioxide as measured at remote sites has been increasing in the atmosphere at an almost linear rate of about 1.4ppmv per year ever since 1972. (john-daly.com)
(1985) on the Siple ice core from the Antarctic (75° 55 S. 83° 55 W). These measurements indicated a constant concentration of carbon dioxide in the atmosphere of about 280ppmv before 1750, and a steady increase in an approximately exponential fashion since then, to join the modern measurements. (john-daly.com)
This partitioning underestimates the full magnitude of the technology challenge associated with stabilizing the amount of carbon dioxide in the atmosphere. (nsf.gov)
Since the middle of the 19th century, human emissions of carbon dioxide have caused the levels in the atmosphere to increase from 270 ppm (parts per million) to 410 ppm. (smhi.se)
Carbon dioxide is one of the most important greenhouse gases and a significant part of global warming can be attributed to the increased levels of carbon dioxide in the atmosphere. (smhi.se)
It would be possible to monitor the exchange of carbon dioxide between ocean and atmosphere, but it requires quite complicated measurements that cannot be carried out everywhere. (smhi.se)
This means that the sea will emit carbon dioxide to the atmosphere near the equator (between 20ºS and 20ºN) and absorb carbon dioxide further away from the equator. (smhi.se)
This transformation from gas to solid avoids the pitfalls of other sequestration projects, where carbon dioxide can leak into the atmosphere or groundwater. (discovermagazine.com)
But its success is noteworthy amid some problematic efforts to pull carbon dioxide from the atmosphere. (discovermagazine.com)
Moreover, we hope this study provides valuable insights into the use of depleted shale gas reservoirs for carbon sequestration, which as a result, a cleaner atmosphere will be achieved for the life of our next generations. (scirp.org)
Human sources and other factors are pouring around 40 billion tonnes of carbon dioxide into the atmosphere each year. (org.in)
Only half of that emitted carbon dioxide stays in the atmosphere while the rest is absorbed by the oceans and vegetation on the earth. (org.in)
It provides a detailed exploration of how the ocean could be used to remove and store carbon dioxide from the atmosphere, describing five commonly discussed ocean CDR techniques-rock-based ocean alkalinity enhancement (OAE), electrochemical OAE, ocean fertilization, artificial upwelling and downwelling, and seaweed cultivation-and exploring the legal issues that different techniques could raise. (e-elgar.com)
Examining the existing legal framework for ocean carbon dioxide removal (CDR), this forward-thinking book highlights potential legal challenges and opportunities associated with using the ocean to remove and store carbon dioxide from the atmosphere. (e-elgar.com)
Carbon dioxide makes up 0.041% of the Earth's atmosphere. (weforum.org)
The 'Keeling Curve,' named for scientist Charles David Keeling, tracks the accumulation of carbon dioxide in Earth's atmosphere, measured in parts per million. (weforum.org)
Based on the chemical properties of tiny micrometeorites that fell to Earth 2.7 billion years ago, a team of researchers says that the planet's atmosphere was likely chock-full of carbon dioxide back then. (astronomy.com)
From their models, the researchers estimate that carbon dioxide made up anywhere from 6 percent to more than 70 percent of our ancient atmosphere. (astronomy.com)
By comparison, our atmosphere today is 0.04 percent carbon dioxide. (astronomy.com)
Wüstite can't form on Earth's surface, so the micrometeorites must have encountered oxygen while they fell through the atmosphere - if not as oxygen gas, then maybe as carbon dioxide. (astronomy.com)
To see what levels of carbon dioxide and other gases would create the minerals they saw, Lehmer and others ran computer models of iron-rich micrometeorites falling through Earth's atmosphere with various concentrations of carbon dioxide. (astronomy.com)
The team found that an atmosphere with lots of carbon dioxide - tens of percent by volume, and possibly 70 percent or more - would make micrometeorites with the right amounts of wüstite. (astronomy.com)
The high concentrations of greenhouse gases like carbon dioxide in the atmosphere would have kept the planet warm enough for liquid water and life. (astronomy.com)
To pin down a more precise number for just how much carbon dioxide was in Earth's atmosphere around this time, Lehmer said, they'd need more micrometeorites to compare their models to. (astronomy.com)
But he's excited that they were able to estimate the carbon dioxide in Earth's atmosphere this way. (astronomy.com)
If they can find even older examples of micrometeorites with wüstite, they could potentially figure out how much carbon dioxide was in Earth's atmosphere over time and paint a clearer picture of the early Earth's history. (astronomy.com)
Raw biogas is mostly methane, but also contains about 30 to 40 percent carbon dioxide, which is typically vented to the atmosphere in a biogas production facility. (prnewswire.com)
PhysOrg.com) -- Water vapor and clouds are the major contributors to Earth's greenhouse effect, but a new atmosphere-ocean climate modeling study shows that the planet's temperature ultimately depends on the atmospheric level of carbon dioxide. (phys.org)
When carbon dioxide increases, more water vapor returns to the atmosphere. (phys.org)
Negative emission technologies include different technologies that can remove carbon dioxide directly from the atmosphere in order to reduce global warming. (lu.se)

Peter Kelemen, a professor of earth and environmental sciences at Columbia University, describes how to capture and store carbon dioxide by speeding up a reaction found naturally in certain rocks. (technologyreview.com)
Scientists are one step closer to a long-sought way to store carbon dioxide in rocks. (sciencenews.org)
Scientists at the Queensland University of Technology have developed a novel approach to carbon capture, using water and an electromagnetic process to store carbon dioxide in carbonates, which could be used to produce building materials. (awa.asn.au)

It is found in the gas state at room temperature, and as the source of available carbon in the carbon cycle, atmospheric CO2 is the primary carbon source for life on Earth. (wikipedia.org)
When carbon dioxide dissolves in water, it forms carbonate and mainly bicarbonate (HCO−3), which causes ocean acidification as atmospheric CO2 levels increase. (wikipedia.org)
Naturally, terrestrial ecosystems are a huge sink for atmospheric carbon dioxide. (sciencedaily.com)
Even if the system's capacity for carbon sequestration increases with higher atmospheric carbon dioxide levels, there are unanswered questions about species diversity. (sciencedaily.com)
Atmospheric levels of carbon dioxide continue to break records despite a dip in climate pollution during the pandemic. (latimes.com)
It is thus of major importance that we have reliable measurements of atmospheric carbon dioxide concentration, not only for recent years, but for the whole period that humans have been emitting carbon dioxide through the combustion of fossil fuels. (john-daly.com)
Since 1958 accurate measurements of atmospheric carbon dioxide concentrations have been carried out by Charles D Keeling, first at the Scripps Institute of Oceanography, La Jolla, California, then from 1974 at the Mauna Loa volcano, Hawaii, and subsequently by other scientists at many other places. (john-daly.com)
The significance of this behaviour is difficult to judge without a knowledge of atmospheric carbon dioxide concentrations from before the industrial era to the beginnings of the atmospheric measurements. (john-daly.com)
Assumed atmospheric carbon dioxide concentrations between 1734 and 1958 have depended heavily on measurements made by Neftel et al. (john-daly.com)
The $465 million OCO-2 mission is designed to be NASA's first satellite devoted to monitoring Earth's atmospheric carbon dioxide. (space.com)
The OCO-2 mission marks NASA's second attempt to measure atmospheric carbon dioxide from space. (space.com)
Timeplot of increase of atmospheric Carbon Dioxide (CO2) concentrations relative to the pre-industrial CO2 long-term mean value of 278ppm. (nasa.gov)
Trends in Atmospheric Carbon Dioxide by NOAA. (nasa.gov)
Without a significant effort to reduce greenhouse gases, including an accelerated deployment of technologies for capturing atmospheric carbon and storing it underground, and sustained growth in renewables such as wind and solar, the world could miss a key global temperature target set by the Paris Agreement and the long-term goal of net-zero climate pollution. (scienceblog.com)
Our climate modeling simulation should be viewed as an experiment in atmospheric physics, illustrating a cause and effect problem which allowed us to gain a better understanding of the working mechanics of Earth's greenhouse effect, and enabled us to demonstrate the direct relationship that exists between rising atmospheric carbon dioxide and rising global temperature," Lacis said. (phys.org)
The bottom line is that atmospheric carbon dioxide acts as a thermostat in regulating the temperature of Earth," Lacis said. (phys.org)
The Intergovernmental Panel on Climate Change has fully documented the fact that industrial activity is responsible for the rapidly increasing levels of atmospheric carbon dioxide and other greenhouse gases. (phys.org)
It is not surprising then that global warming can be linked directly to the observed increase in atmospheric carbon dioxide and to human industrial activity in general. (phys.org)

For technologies that remove carbon dioxide from point sources, see Carbon capture and storage . (wikipedia.org)
BassiriRad has some doubts about Illinois' ComEd and other utility companies' hopes for "offset credits," whereby industries can save some of their pollutant allowances in the congressionally mandated emissions trading market by planting trees to remove carbon dioxide from the air. (sciencedaily.com)

The resulting porous graphene was then tested on a range of gases including "hydrogen, carbon dioxide, argon, nitrogen, methane and sulphur hexaflouride -- which range in size from 0.29 to 0.49 nanometers. (ieee.org)
Researchers think there were probably a lot of greenhouse gases, like carbon dioxide or methane, on Earth around this time. (astronomy.com)
The initiative will research the use of microbes to convert carbon dioxide directly to methane using renewable electricity, a process known as microbial electromethanogenesis (ME). (prnewswire.com)
The research will continue past research by Spormann Laboratory on microbes that create methane, as well as advances in 3D-printed carbon aerogel electrode materials made by LLNL, which will be assessed for their viability in reactors. (prnewswire.com)
Capturing methane and carbon dioxide from farms, wastewater treatment plants and landfills and then delivering it through existing pipelines is a cost-effective option to reduce greenhouse gas emissions. (prnewswire.com)
Notably, the team identified non-condensing greenhouse gases -- such as carbon dioxide, methane, nitrous oxide, ozone, and chlorofluorocarbons -- as providing the core support for the terrestrial greenhouse effect. (phys.org)

However, it is the 25 percent non-condensing greenhouse gas component, which includes carbon dioxide, that is the key factor in sustaining Earth's greenhouse effect. (phys.org)
By this accounting, carbon dioxide is responsible for 80 percent of the radiative forcing that sustains the Earth's greenhouse effect. (phys.org)

There is potential to remove and sequester up to 10 gigatons of carbon dioxide per year by using those existing CDR methods which can be safely and economically deployed now. (wikipedia.org)
Applying their method to the recent past, the researchers found that global carbon dioxide emissions have remained steady at around 36 gigatons of carbon dioxide for the third year in a row in 2016. (scienceblog.com)

If nothing else, his research shows it's not easy precisely to quantify and verify the amount of carbon sequestered by forest trees. (sciencedaily.com)
A carbon dioxide (CO2) blood test measures the amount of carbon dioxide in your blood. (medlineplus.gov)
Some prescription and over-the-counter medicines can increase or decrease the amount of carbon dioxide in your blood. (medlineplus.gov)
2016 was the first year that natural gas surpassed coal for electricity generation," said Jackson, who is also chair of the Global Carbon Project , which tracks the amount of carbon dioxide emitted by humans each year. (scienceblog.com)

Thus, when humans are present, the background level of carbon dioxide increases. (medicalnewstoday.com)

Reducing global emissions of carbon dioxide (CO 2 ) over the coming century will be more challenging than society has been led to believe, according to a research commentary appearing this week in the journal Nature . (nsf.gov)

Although the most important of these gases is water vapour, its effect is usually regarded as being primarily reliant on the accumulation of carbon dioxide. (john-daly.com)

Concentrations of carbon dioxide averaged 419 parts per million in May, the highest tally for any month since records began over six decades ago, scientists at UC San Diego's Scripps Institution of Oceanography reported Monday. (latimes.com)
High concentrations of carbon dioxide over North America, Europe and China may be associated with human activities. (org.in)

In an effort to reach zero carbon emissions by 2050, the Biden administration is offering more tax credits for carbon capture sequestration and utilization. (kosu.org)
Three companies are proposing pipelines across the Midwest that would carry carbon dioxide captured from ethanol plants to underground sequestration sites. (kosu.org)
It's another path to carbon sequestration -one American company is working to develop nanotube membranes for use directly in carbon-spewing smoke stacks. (good.is)
Carbon Dioxide (CO 2 ) storage and sequestration in unconventional shale resources has been attracting interest since last couple of years due to the very unique characteristics of such formations have made them a feasible option for this object. (scirp.org)
National Energy Technology Laboratory (2010) Carbon Sequestration Atlas of the United States and Canada. (scirp.org)

Scientists from the University of Illinois at Chicago have synthesized a catalyst that improves their system for converting waste carbon dioxide into syngas, a precursor of gasoline and other energy-rich products, bringing the process closer to commercial viability. (scienceblog.com)
A new approach employs sunlight to convert waste carbon dioxide into these needed chemicals, potentially reducing emissions in two ways: by using the unwanted gas as a raw material and sunlight, not fossil fuels, as the source of energy needed for production. (scientificamerican.com)
Then the chemical industry-by transforming what today is waste carbon dioxide into valuable products-will move a step closer to becoming part of a true, waste-free, circular economy, as well as helping to make the goal of generating negative emissions a reality. (scientificamerican.com)

PhD researcher Olawale Oloye and Professor Anthony O'Mullane developed the process , which captures carbon dioxide through a reaction with an alkaline solution, which is then combined to produce carbonate products. (awa.asn.au)

Although it efficiently converts carbon dioxide into other molecules solely in response to ultraviolet light, doping it with nitrogen greatly lowers the energy required to do so. (scientificamerican.com)

Now, Northwestern University researchers have worked with an international team of collaborators to create acetic acid out of carbon monoxide derived from captured carbon. (sciencedaily.com)
Their alternative method takes place via a two-step process: first, captured gaseous CO 2 is passed through an electrolyzer, where it reacts with water and electrons to form carbon monoxide (CO). Gaseous CO is then passed through a second electrolyzer, where another catalyst transforms it into various molecules containing two or more carbon atoms. (sciencedaily.com)
In other chemical-reduction systems, the only reaction product is carbon monoxide. (scienceblog.com)
The new catalyst produces syngas, a mixture of carbon monoxide plus hydrogen. (scienceblog.com)
The proportion of carbon monoxide to hydrogen in the syngas produced in the reaction can also be easily manipulated using the new catalyst, said Salehi-Khojin. (scienceblog.com)

That demand is being addressed by careful engineering of the composition, structure and morphology of existing catalysts, such as titanium dioxide. (scientificamerican.com)
Polyaniline/titanium dioxide nanorods functionalized carbon fibers for in-tube solid-phase microextraction of phthalate esters prior to high performance liquid chromatography-diode array detection. (bvsalud.org)
To improve extraction performance of carbon fibers (CFs) towards phthalate esters (PAEs), titanium dioxide (TiO2) nanorods array was in-situ grown on the surface of CFs, then polyaniline (PANI) was used to modify it. (bvsalud.org)

In the air, carbon dioxide is transparent to visible light but absorbs infrared radiation, acting as a greenhouse gas. (wikipedia.org)
Synonyms for CDR include greenhouse gas removal (GGR), [11] negative emissions technology, [10] and carbon removal . (wikipedia.org)
[11] Therefore, in most contexts, greenhouse gas removal means carbon dioxide removal . (wikipedia.org)
Nasa's Orbiting Carbon Observatory (OCO-2) has sent first global maps of the greenhouse gas CO2. (org.in)

It is made up of molecules that each have one carbon atom covalently double bonded to two oxygen atoms. (wikipedia.org)
Plants, algae and cyanobacteria use energy from sunlight to synthesize carbohydrates from carbon dioxide and water in a process called photosynthesis, which produces oxygen as a waste product. (wikipedia.org)
The length of the carbon-oxygen bond in carbon dioxide is 116.3 pm, noticeably shorter than the roughly 140-pm length of a typical single C-O bond, and shorter than most other C-O multiply bonded functional groups such as carbonyls. (wikipedia.org)
Among a number of interactions about which a great deal is known there are those involved in taking a carbon dioxide molecule (basically linear oxygen to carbon to oxygen) from its ground bending vibrational state to its first excited bending vibrational state. (skepticalscience.com)
In recent years investigators have developed photocatalysts that break the resistant double bond between carbon and oxygen in carbon dioxide. (scientificamerican.com)
is to take in oxygen and eliminate carbon dioxide. (msdmanuals.com)
Oxygen-deficient, carbon dioxide-rich blood returns to the right side of the heart through two large veins, the superior vena cava and the inferior vena cava. (msdmanuals.com)
Then the blood is pumped through the pulmonary artery to the lungs, where it picks up oxygen and releases carbon dioxide. (msdmanuals.com)
To support the absorption of oxygen and release of carbon dioxide, about 5 to 8 liters (about 1.3 to 2.1 gallons) of air per minute are brought in and out of the lungs, and about three tenths of a liter (about three tenths of a quart) of oxygen is transferred from the alveoli to the blood each minute, even when the person is at rest. (msdmanuals.com)
The function of the respiratory system is to move two gases: oxygen and carbon dioxide. (msdmanuals.com)
As shown below, inhaled oxygen moves from the alveoli to the blood in the capillaries, and carbon dioxide moves from the blood in the capillaries to the air in the alveoli. (msdmanuals.com)
There were no significant differences between the effects of wearing an N95 FFR on pregnant and non-pregnant women with respect to their heart rate and function, breathing rate, percentage of oxygen and carbon dioxide in their arteries, ear temperature, and blood pressure, as well as their impressions of any warmth or exertion associated with the respirator. (cdc.gov)

Among the major ecosystems of the world, temperate forests of conifers and broad-leafed plants such as maples, oaks and birches form the largest terrestrial sink for carbon, and recent studies indicate that temperate forests of North America are a larger carbon sink than previously thought. (sciencedaily.com)

The absorption of carbon dioxide by the sea is a complicated process that is dependant on the difference in the in concentration of carbon dioxide between the sea surface and the air, and the efficiency of the exchange. (smhi.se)

Recent changes in 'carbon intensity'--CO 2 emissions per unit of energy consumed--already are higher than those predicted by the IPCC because of rapid economic development, says lead author Pielke. (nsf.gov)
According to calculations by the Nature authors, the IPCC assumes that 57 to 96 percent of the total carbon removed from the energy supply will occur automatically through such routine technological progress. (nsf.gov)
The reason for the IPCC's underestimate of carbon intensity changes lies partly in the way the IPCC emissions scenarios partition future emissions changes into those that will occur spontaneously and those that are policy-driven, say the scientists. (nsf.gov)
According to the latest estimate from the IPCC, a carbon dioxide level of 460 ppm would lead to an average temperature several tenths of a degree higher than today. (smhi.se)

Scientists in Iceland are using a new technology to capture carbon emissions and inject them into basalt deposits. (kosu.org)
Scientists have converted carbon dioxide into clean air! (lifeboat.com)
The problem now: Scientists are linking increased carbon dioxide levels with widespread midcontinental drought, and that could tip the Sandhills back to massive desertification. (backpacker.com)
The scientists are keen to understand where the carbon dioxide is going and whether natural systems are losing their capacity to absorb CO2. (org.in)

Once in space, the craft will take measurements of the planet's carbon dioxide 24 times each second. (space.com)

The symmetry of a carbon dioxide molecule is linear and centrosymmetric at its equilibrium geometry. (wikipedia.org)
Carbon dioxide is a molecule that has been extensively studied in this way and there is available today an incredible depth of knowledge about the interaction of carbon dioxide with electromagnetic radiation. (skepticalscience.com)

The researchers suggest the mosquitoes use an ambush strategy based on "sit and wait," where they ignore the persistent background human odor until this other signal - change in ambient carbon dioxide - tells them a living human is present. (medicalnewstoday.com)
At Scotland's University of Edinburgh, researchers are developing a minuscule tube that can suck carbon dioxide out of the air. (good.is)
In June, researchers working in Iceland announced they had turned carbon dioxide into stone. (discovermagazine.com)
Looking to the future, the researchers predict that the greatest challenge to meeting the goals of the Paris Agreement is the slower than expected rollout of carbon capture and storage technologies. (scienceblog.com)
Most scenarios suggest the need for thousands of facilities with carbon capture and storage by 2030, the researchers say, far below the tens that are currently proposed. (scienceblog.com)

The state geologist has said that Texas could become a national repository for carbon dioxide, pointing out an irony: Texas, which is the country's largest emitter of greenhouse gases and has a Legislature reluctant to limit emissions, could end up reaping billions of dollars from federal caps on the gas. (organicconsumers.org)
To account for this, the term CO2e is used and means that greenhouse gases other than carbon dioxide can be converted, or normalized, to the equivalent amount of CO2, based on their relative contribution to global warming. (un-redd.org)
Carbon dioxide and other greenhouse gases trap heat on the planet that would otherwise radiate into space. (latimes.com)
Without carbon dioxide and other non-condensing greenhouse gases, water vapor and clouds would be unable to provide the feedback mechanisms that amplify the greenhouse effect. (phys.org)
A companion study led by GISS co-author Gavin Schmidt that has been accepted for publication in the Journal of Geophysical Research shows that carbon dioxide accounts for about 20 percent of the greenhouse effect, water vapor and clouds together account for 75 percent, and minor gases and aerosols make up the remaining five percent. (phys.org)

In the gas phase, carbon dioxide molecules undergo significant vibrational motions and do not keep a fixed structure. (wikipedia.org)

Amin Salehi-Khojin, UIC professor of mechanical and industrial engineering, and his coworkers developed a unique two-step catalytic process that uses molybdenum disulfide and an ionic liquid to "reduce," or transfer electrons, to carbon dioxide in a chemical reaction. (scienceblog.com)
The high density of loosely bound, energetic d-electrons in molybdenum disulfide facilitates charge transfer, driving the reduction of the carbon dioxide, said Salehi-Khojin, principal investigator on the study. (scienceblog.com)
Photocatalysts are typically semiconductors, which require high-energy ultraviolet light to generate the electrons involved in the transformation of carbon dioxide. (scientificamerican.com)

Can utility companies adopt a similar strategy, mitigating their carbon dioxide emissions - which contribute to global climate change -- by planting trees? (sciencedaily.com)
Climeworks is capturing carbon dioxide from the air in an act to fight climate change. (yahoo.com)
The nanotube technology is also a kind of geoengineering , which aims to slow climate change by capturing carbon. (good.is)
The manufacture of many chemicals important to human health and comfort consumes fossil fuels, thereby contributing to extractive processes, carbon dioxide emissions and climate change. (scientificamerican.com)
Negative emission technologies, or large scale carbon dioxide removal, are by many assessments, policy makers, industries and companies, seen as key to slow or halt climate change. (lu.se)

They may even contain the so-called missing carbon -- accounting for the fact that carbon dioxide levels in the northern hemisphere are lower than models predict. (sciencedaily.com)
Different species appear to have different responses to elevated levels of carbon dioxide. (sciencedaily.com)
They found the mosquitoes' landing on a source of skin odor was dramatically increased when carbon dioxide was also present, even at concentrations that barely exceeded background levels. (medicalnewstoday.com)
This Joint Industry Project by DNV will take a look at how increasing acceptable levels of H 2 S will affect the risk for Sulphide Stress Cracking (SSC) and corrosion damages in carbon steel pipelines used for CCS. (dnv.com)
Having such high levels of carbon dioxide would have been fortuitous for early organisms, given that the sun was dimmer in the past and Earth would have been receiving less light. (astronomy.com)
The study ties in to the geologic record in which carbon dioxide levels have oscillated between approximately 180 parts per million during ice ages, and about 280 parts per million during warmer interglacial periods. (phys.org)
Carbon-dioxide (124389) levels in most areas of the school increased over the course of the day. (cdc.gov)

We already know that mosquitoes will readily fly upwind towards human skin odor but landing - the final stage of host location, which typically takes place indoors - does not occur unless a fluctuating concentration of carbon dioxide indicates that a human host is present. (medicalnewstoday.com)
The concentration of carbon dioxide in the sea surface is higher around the equator and lower nearer the poles. (smhi.se)

Humans - like other animals - exhale carbon dioxide. (medicalnewstoday.com)

Joint industry project to investigate the integrity of carbon dioxide pipelines subjected to hydrogen sulfide from the carbon dioxide stream for carbon capture and storage applications. (dnv.com)

When you exhale, you breathe out carbon dioxide. (medlineplus.gov)

Texas emits at least 650 million tons of carbon dioxide each year - if the state were its own nation, it would be the seventh-largest emitter globally - and some officials say the state needs to prepare for the possibility of federal rules on carbon dioxide emissions. (organicconsumers.org)
Carbon dioxide laser emits light at a wavelength of 10,600 nm that is absorbed strongly by water (the primary chromophore for carbon dioxide light that is abundant in skin). (medscape.com)

Most of the catalysts used for this second step facilitate multiple simultaneous reactions, which leads to a mix of different two-carbon products that can be hard to separate and purify. (sciencedaily.com)
This is a real breakthrough that can take a waste gas - carbon dioxide - and use inexpensive catalysts to produce another source of energy at large-scale, while making a healthier environment. (scienceblog.com)

First responders at Los Angeles International Airport, where a carbon dioxide leak left four workers sick Monday. (latimes.com)
A carbon dioxide leak at Los Angeles International Airport left four workers sick Monday morning, including one man in critical condition, according to the Los Angeles Fire Department. (latimes.com)
No passengers were medically affected by the carbon dioxide leak at Los Angeles International Airport, according to the Los Angeles Fire Department. (latimes.com)
Above, first responders investigate the scene where a carbon dioxide leak occurred Monday at LAX. (latimes.com)

But brewers now face a carbon dioxide shortage - and the risk of production cuts and price hikes. (npr.org)
But brewers are now worried that a carbon dioxide shortage could force production cuts and price hikes. (npr.org)
There is currently a national shortage of carbon dioxide (CO2) gas in the U.S due to several factors that are beyond Airgas' reasonable control. (brown.edu)

We're very early into the mission and collecting data, yet as we show, we can take five weeks of that information and give you a quick picture of global carbon dioxide,' said Eldering. (org.in)
The basic idea is to perform advanced and detailed in situ measurements of ecosystem properties and processes to increase understanding of the role savannas and grassland play in the global carbon cycle. (lu.se)

With this catalyst, we can directly reduce carbon dioxide to syngas without the need for a secondary, expensive gasification process," he said. (scienceblog.com)

Last year, energy-related carbon dioxide emission fell by the largest percentage since the 1940s, according to the International Energy Agency. (latimes.com)
Some examples of negative emission technologies include tree planting, bioenergy with carbon capture and storage (BECCS), and direct air capture (DAC). (lu.se)

Similarly, carbon dioxide passes from the blood into the alveoli and is then exhaled. (msdmanuals.com)

Beer makers have dealt with carbon dioxide shortages and price hikes for much of the pandemic, similar to higher costs for aluminum cans and cardboard. (npr.org)
Even before the pandemic, carbon dioxide was prone to supply snags. (npr.org)

WARNING: Administration of Carbon Dioxide may be hazardous or contraindicated. (nih.gov)

Carbon dioxide has no taste, no odor, and no color - but it's a vital ingredient in the beer business, from putting frothy bubbles in brews to blocking oxidization that makes beer taste stale. (npr.org)
They also want to find out if the mosquitoes' response to skin odor is affected by carbon dioxide outdoors. (medicalnewstoday.com)

Because the launch window lasted only 30 seconds, mission controllers did not have time to analyze the issue and get the United Launch Alliance Delta 2 rocket carrying NASA's Orbiting Carbon Observatory-2 (OCO-2) spacecraft back on track for launch this morning. (space.com)

Planting trees counts as a type of geoengineering, too, because it performs the same carbon-capturing function. (good.is)

By using electrochemistry to convert captured carbon into products with established markets, we provide new pathways to improving these economics, as well as a more sustainable source for the industrial chemicals that we still need. (sciencedaily.com)
His team has a track record of using electrolyzers -- devices in which electricity drives a desired chemical reaction forward -- to convert captured carbon into key industrial chemicals, including ethylene and propanol. (sciencedaily.com)

Carbon capture is feasible today from a technical point of view, but not yet from an economic point of view," Sargent said. (sciencedaily.com)

Global energy demand is projected to grow rapidly, and these huge new demands must be met by largely carbon-neutral energy sources--sources that either do not use fossil fuels or that capture and store any emitted CO 2 . (nsf.gov)

Going one step further, another team was expected to announce in late 2016 that it had found a way to mineralize carbon dioxide - without adding any water. (discovermagazine.com)

Carbon dioxide is soluble in water and is found in groundwater, lakes, ice caps, and seawater. (wikipedia.org)
The carbon dioxide was accidentally released but is properly used to fight fires in the electrical room without destroying equipment with water, Scott said. (latimes.com)
To produce calcium carbonate, the process comprises dissolving carbon dioxide in water containing calcium chloride. (awa.asn.au)
The team captured carbon dioxide emitted by a geothermal plant and injected it, along with water, into basalt rock. (discovermagazine.com)
The graphs show flux data of water and carbon dioxide.Negative CO 2 flux values mean that the vegetation is taking up carbon through photosynthesis, while positive values indicate that the respiration taking place in the vegetation and in the soil is dominating. (lu.se)

There is still no proper record of the carbon dioxide concentrations over industrial regions, or over forests and other cultivated regions. (john-daly.com)

Once supercritical, carbon dioxide has properties of both gas and liquid, allowing it to undergo a chemical reaction with the basalt, turning CO2 into stone. (discovermagazine.com)

There is no 'pre-industrial' equilibrium carbon dioxide concentration. (john-daly.com)

Examining the existing legal framework for ocean carbon dioxide removal, this forward-thinking book explores whether, when, where, and how future research and deployment can take place in the field. (e-elgar.com)

CDR can be confused with carbon capture and storage (CCS), a process in which carbon dioxide is collected from point-sources such as gas-fired power plants , whose smokestacks emit CO 2 in a concentrated stream. (wikipedia.org)
The innovation, which uses a novel catalyst created in the lab of professor Ted Sargent, could spur new interest in carbon capture and storage. (sciencedaily.com)
The RP was not developed with carbon capture and storage (CCS) in mind. (dnv.com)
State officials are exploring how to capture carbon dioxide from specially built power plants and inject it underground beneath the Gulf Coast and the oil-rich Permian Basin in West Texas. (organicconsumers.org)
But some groups, such as Greenpeace, have described carbon capture and storage as a corporate boondoggle. (organicconsumers.org)
The durable CDR methods referenced include Direct Air Carbon Capture and Storage (DACCS), Biomass with Carbon Removal and Storage (BiCRS), Enhanced Weathering/Carbon Dioxide (CO 2 ) Mineralization, and Ocean Alkalinity Enhancement. (bcg.com)
Jackson notes that carbon capture and storage technology will prove even more crucial if President Donald Trump follows through with his campaign pledge of resuscitating the nation's struggling coal industry. (scienceblog.com)
There's no way to reduce the carbon emissions associated with coal without carbon capture and storage," Jackson said. (scienceblog.com)

3,500 leaf stable carbon isotope measurements. (nature.com)

The authors note how the female mosquitoes' landing on the samples "was dramatically increased by addition of carbon dioxide at a range of concentrations above ambient. (medicalnewstoday.com)
While a minimal dose of carbon dioxide (90 ppm) activated the mosquitoes, 10 times this amount suppressed them. (who.int)

Oceans and other natural ecosystems also act as what are known as carbon sinks. (latimes.com)

The highest monthly averages for carbon dioxide typically happen in May, before plants in the Northern Hemisphere start to suck up large amounts of the gas during the growing season. (latimes.com)

Anatomy6

Organisms11

Diseases15

Chemicals and Drugs82

Analytical, Diagnostic and Therapeutic Techniques and Equipment53

Phenomena and Processes68

Disciplines and Occupations3

Technology, Industry, Agriculture5

Information Science2

Health Care27

Geographicals1

Atmosphere44

Store carbon dioxide3

Atmospheric18

Remove carbon dioxide2

Methane6

Earth's2

Gigatons of carbon dioxide2

Amount of carbon4

Level of carbon dioxide1

Emissions of carbon dioxide1

Accumulation of carbon dioxide1

Concentrations of carbon dioxide2

Sequestration5

Waste carbon dioxide3

Captures carbon dioxide1

Converts carbon dioxide1

Monoxide5

Titanium dioxide3

Greenhouse gas4

Oxygen12

North America1

Absorption1

IPCC4

Scientists4

Planet's1

Molecule2

Researchers5

Gases5

Molecules1

Electrons3

Climate change5

Levels7

Concentration of carbon2

Humans1

Hydrogen1

Exhale1

Emits2

Catalysts2

Leak4

Shortage3

Global carbon2

Reduce carbon1

Emission2

Similarly1

Pandemic2

Hazardous1

Odor2

NASA's1

Capturing1

Convert2

Feasible1

Fossil fuels1

20161

Water5

Forests1

Basalt1

Equilibrium1

Ocean carbon1

Capture8

Measurements1

Mosquitoes2

Sinks1

Typically1