Environmental Pollution: Contamination of the air, bodies of water, or land with substances that are harmful to human health and the environment.Air Pollution: The presence of contaminants or pollutant substances in the air (AIR POLLUTANTS) that interfere with human health or welfare, or produce other harmful environmental effects. The substances may include GASES; PARTICULATE MATTER; or volatile ORGANIC CHEMICALS.Metals, Heavy: Metals with high specific gravity, typically larger than 5. They have complex spectra, form colored salts and double salts, have a low electrode potential, are mainly amphoteric, yield weak bases and weak acids, and are oxidizing or reducing agents (From Grant & Hackh's Chemical Dictionary, 5th ed)Water Pollution: Contamination of bodies of water (such as LAKES; RIVERS; SEAS; and GROUNDWATER.)Fluoride PoisoningEnvironmental Pollutants: Substances or energies, for example heat or light, which when introduced into the air, water, or land threaten life or health of individuals or ECOSYSTEMS.Air Pollutants: Any substance in the air which could, if present in high enough concentration, harm humans, animals, vegetation or material. Substances include GASES; PARTICULATE MATTER; and volatile ORGANIC CHEMICALS.Environmental Exposure: The exposure to potentially harmful chemical, physical, or biological agents in the environment or to environmental factors that may include ionizing radiation, pathogenic organisms, or toxic chemicals.Environmental Monitoring: The monitoring of the level of toxins, chemical pollutants, microbial contaminants, or other harmful substances in the environment (soil, air, and water), workplace, or in the bodies of people and animals present in that environment.Industrial Waste: Worthless, damaged, defective, superfluous or effluent material from industrial operations.Industry: Any enterprise centered on the processing, assembly, production, or marketing of a line of products, services, commodities, or merchandise, in a particular field often named after its principal product. Examples include the automobile, fishing, music, publishing, insurance, and textile industries.Water Pollutants, Chemical: Chemical compounds which pollute the water of rivers, streams, lakes, the sea, reservoirs, or other bodies of water.Environmental Health: The science of controlling or modifying those conditions, influences, or forces surrounding man which relate to promoting, establishing, and maintaining health.Soil Pollutants: Substances which pollute the soil. Use for soil pollutants in general or for which there is no specific heading.Lead: A soft, grayish metal with poisonous salts; atomic number 82, atomic weight 207.19, symbol Pb. (Dorland, 28th)Cadmium: An element with atomic symbol Cd, atomic number 48, and atomic weight 114. It is a metal and ingestion will lead to CADMIUM POISONING.Biodegradation, Environmental: Elimination of ENVIRONMENTAL POLLUTANTS; PESTICIDES and other waste using living organisms, usually involving intervention of environmental or sanitation engineers.Particulate Matter: Particles of any solid substance, generally under 30 microns in size, often noted as PM30. There is special concern with PM1 which can get down to PULMONARY ALVEOLI and induce MACROPHAGE ACTIVATION and PHAGOCYTOSIS leading to FOREIGN BODY REACTION and LUNG DISEASES.Nitrogen Dioxide: Nitrogen oxide (NO2). A highly poisonous gas. Exposure produces inflammation of lungs that may only cause slight pain or pass unnoticed, but resulting edema several days later may cause death. (From Merck, 11th ed) It is a major atmospheric pollutant that is able to absorb UV light that does not reach the earth's surface.Sulfur Dioxide: A highly toxic, colorless, nonflammable gas. It is used as a pharmaceutical aid and antioxidant. It is also an environmental air pollutant.Air Pollution, Indoor: The contamination of indoor air.Vehicle Emissions: Gases, fumes, vapors, and odors escaping from the cylinders of a gasoline or diesel internal-combustion engine. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed & Random House Unabridged Dictionary, 2d ed)Ozone: The unstable triatomic form of oxygen, O3. It is a powerful oxidant that is produced for various chemical and industrial uses. Its production is also catalyzed in the ATMOSPHERE by ULTRAVIOLET RAY irradiation of oxygen or other ozone precursors such as VOLATILE ORGANIC COMPOUNDS and NITROGEN OXIDES. About 90% of the ozone in the atmosphere exists in the stratosphere (STRATOSPHERIC OZONE).Respiratory Tract DiseasesEpidemiological Monitoring: Collection, analysis, and interpretation of data about the frequency, distribution, and consequences of disease or health conditions, for use in the planning, implementing, and evaluating public health programs.Water Pollution, Chemical: Adverse effect upon bodies of water (LAKES; RIVERS; seas; groundwater etc.) caused by CHEMICAL WATER POLLUTANTS.Cities: A large or important municipality of a country, usually a major metropolitan center.Particle Size: Relating to the size of solids.

*  Visual Pollution - environmental, pollutants, United States, causes, EPA, soil, world, power, sources, health

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*  Animal Pharm: 2012

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*  EV5907: Project in Environmental Pollution and Remediation - Catalogue of Courses

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*  September 2, 2017 | Science News

Light pollution can foil plant-insect hookups, and not just at night ... pollination foiled by light pollution, a map of dark matter, an ancient sea worm and more. ...
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*  Smelting - environmental, pollutants, impact, EPA, soil, industrial, toxic, world, sources, disposal, health

Pollution Shifting, Popular Culture, Population, Poverty, Precautionary Principle, President's Council on Environmental Quality ... One type of pollution attributed to air emissions is acid rain. The smelting of sulfide ores results in the emission of sulfur ... When compared to pollution caused by air emissions, process wastes and slag are of less concern. In modern smelters, much of ... The environmental impact was completely or partially denuded vegetation on over 46,000 hectares and 7,000 acid-damaged lakes. ...
pollutionissues.com/Re-Sy/Smelting.html

*  Vehicular Pollution - water, effects, environmental, pollutants, impact, EPA, chemicals, toxic, human, power, sources, use,...

Thermal Pollution, Times Beach, Missouri, Tobacco Smoke, Todd, John Innovative Ecological Designer (1939-), Toxic Release ... Primary pollution from motor vehicles is pollution that is emitted directly into the atmosphere, whereas secondary pollution ... In many cities, NO x pollution accounts for one-third of the fine particulate pollution in the air. ... Ingredients of Vehicular Pollution The following are the major pollutants associated with motor vehicles: * Ozone (O 3 ). The ...
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*  Why environmental regulation may lead to no-regret pollution abatement?

An econometric application confirms that marginal pollution abatement cost curves with no-regret options are compatible with a ... We provide a microeconomic rationale for the existence of such potential at the firm's level under environmental regulation. ... Empirical evidence support the existence of pollution abatement possibilities at negative costs, the so-called 'no-regret ... "Optimal growth with pollution: how to use pollution permits?," Journal of Economic Dynamics and Control, Elsevier, vol. 29(9), ...
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*  Noise pollution - environmental pollution, Biology

... environmental pollution, Noise Pollution - Environmental Pollution Noise is unwanted sound or excessively high levels of sound ... Noise pollution is not only an annoyance, but at sufficiently high levels, it may cause loss of hearing. Noise pollution has ... Noise pollution - environmental pollution Discussions Write discussion on Noise pollution - environmental pollution. Your posts ... environmental pollution, Assignment Help, Ask Question on Noise pollution - environmental pollution, Get Answer, Expert's Help ...
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*  Academic: Environmental pollution Ebooks

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*  Environmental Pollution Act 1990 (Hansard)

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*  Fireworks cause environmental pollution

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*  Environmental pollution and control | Oxfam GB | Oxfam's Online Shop

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*  Hydroquinone: Environmental Pollution, Toxicity, and Microbial Answers : Figure 3

Figure 3: Phylogenetic circular cladogram of hydroquinone 1,2-dioxygenase sequences in diverse bacteria. Species from the genera Sphingomonas and Sphingobium are shadowed ...
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*  International Journal of Environmental Pollution and Control Research (JournalSeek)

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*  European Commission : CORDIS : Publications : Final Report - HEREPLUS (HEalth Risk from Environmental Pollution Levels in Urban...

Final Report - HEREPLUS (HEalth Risk from Environmental Pollution Levels in Urban Systems). Project ID: 212854 ... Final Report Summary - HEREPLUS (HEalth Risk from Environmental Pollution Levels in Urban Systems) ... Final Report - HEREPLUS (HEalth Risk from Environmental Pollution Levels in Urban Systems) ... The document reports an example of relational database scheme for air pollution and climatic data. It also gives examples of ...
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*  Air Pollution - Environmental Policy - UNECE

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*  Toxic and pollution environmental right to know maps around the globe

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*  Meetings and Events - Air Pollution - Environmental Policy - UNECE

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*  Environmental policy, pollution, unemployment, and endogenous growth

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*  A TIME'S MEMORY: Highly pathogenic #avian #influenza #H5N8, #Germany [thirty-one #poultry and #wildbirds #outbreaks] (#OIE, Feb...

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Polarized light pollution: Polarization is a property of light waves that describes the orientation of their oscillations. Polarized light pollutionGábor Horváth, György Kriska, Péter Malik, Bruce Robertson.Air pollution: Air pollution is the introduction of particulates, biological molecules, or other harmful materials into Earth's atmosphere, causing diseases, death to humans, damage to other living organisms such as animals and food crops, or the natural or built environment. Air pollution may come from anthropogenic or natural sources.Phytoextraction process: Phytoextraction is a subprocess of phytoremediation in which plants remove dangerous elements or compounds from soil or water, most usually heavy metals, metals that have a high density and may be toxic to organisms even at relatively low concentrations.http://www.United States regulation of point source water pollution: Point source water pollution comes from discrete conveyances and alters the chemical, biological, and physical characteristics of water. It is largely regulated by the Clean Water Act (CWA) of 1972.P-AnisidineIndustrial waste: Industrial waste is the waste produced by industrial activity which includes any material that is rendered useless during a manufacturing process such as that of factories, mills, and mining operations. It has existed since the start of the Industrial Revolution.Pocket petGreat Lakes Environmental Research Laboratory: right|300px|thumb|Great Lakes Environmental Research Laboratory logo.PyromorphiteMorbidity and Mortality Weekly Report: The Morbidity and Mortality Weekly Report is a weekly epidemiological digest for the United States published by the Centers for Disease Control and Prevention (CDC). It is the main vehicle for publishing public health information and recommendations that have been received by the CDC from state health departments.Cadmium acetateBiodegradationParticulates: Atmospheric particulate matter – also known as particulate matter (PM) or particulates – is microscopic solid or liquid matter suspended in the Earth's atmosphere. The term aerosol commonly refers to the particulate/air mixture, as opposed to the particulate matter alone.Metal sulfur dioxide complex: Metal sulfur dioxide complexes are complexes that contain sulfur dioxide, SO2, bonded to a transition metal. Such compounds are common but are mainly of theoretical interest.Indoor air pollution in developing nations: Indoor air pollution in developing nations is a significant form of indoor air pollution (IAP) that is little known to those in the developed world.Exhaust gasOzone Action Day: An Ozone Action Day, which can be declared by a local municipality, county or state, is observed at certain times during the summer months, when weather conditions (such as heat, humidity, and air stagnation) run the risk of causing health problems.Coulter counter: 150px|thumb|right|The tip of the Coulter counter in a buffer solution, counting cells in solution.

(1/630) The role of domestic factors and day-care attendance on lung function of primary school children.

The results of studies examining the relationship of domestic factors to lung function are contradictory. We therefore examined the independent effects of maternal smoking during pregnancy, exposure to environmental tobacco smoke (ETS), the presence of a cat, type of heating and cooking used in the home and day-care attendance on lung function after controlling for socioeconomic status (SES). Nine hundred and eighty-nine children from 18 Montreal schools were studied between April 1990 and November 1992. Information on the child's health and exposure to domestic factors was collected by questionnaire. Spirometry was performed at school. The data were analysed by multiple linear regression with percent predicted FEV1, FVC, and FEV1/FVC as dependent variables. In the overall sample (both sexes combined), cat in the home (regression coefficient, beta = -1.15, 95% confidence interval, CI: -2.26-(-)0.05) and electric baseboard units (beta = -1.26, 95% CI: -2.39-(-)0.13) were independently associated with a lower FEV1/FVC, while day-care attendance (beta = -2.05, 95% CI: -3.71-(-)0.40) significantly reduced FEV1. Household ETS was significantly associated with increasing level of FVC (beta = 2.86, 95% CI: +0.55 to +5.17). In boys but not girls, household ETS (beta = -2.13, 95% CI: -4.07-(-)0.19) and the presence of a cat (beta = -2.19, 95% CI: -3.94-(-)0.45) were associated with lower FEV1/FVC. By contrast, day-care attendance was associated with lower FEV1 (beta = -2.92, 95% CI: -5.27-(-)0.56) and FEV1/FVC (beta = -1.53, 95% CI: -2.73-(-)0.33) in girls only. In conclusion, the results provide evidence that domestic factors and day-care attendance primarily affected airway caliber and gender differences were apparent in the effects of these factors.  (+info)

(2/630) Prostatic intraepithelial neoplasia and apoptosis in benign prostatic hyperplasia before and after the Chernobyl accident in Ukraine.

The prevalence of prostatic intraepithelial neoplasia (PIN) in men who underwent surgery for benign prostatic hyperplasia (BPH) before and after the Chernobyl nuclear accident was studied. BPH samples were obtained by adenomectomy from 45 patients operated in 1984 before the accident (Group I), and 47 patients from the low contaminated Kiev City (Group II) and 76 from high contaminated area (Group III) operated between 1996 and 1998. Their BPH samples were examined histologically and immunohistochemically. The incidences of prostatic intraepithelial neoplasia (PIN) and high grade PIN (HGPIN) were 15.5 and 11.1% in Group I, 29.8 and 14.9% in Grpoup II, and 35. 5 and 19.7% in Group III. The difference between the incidences of PIN in Group I and III is significant (p<0.02). There was increased apoptosis in areas of PIN in Group II and III as compared to Group I (p<0.001). Since apoptosis has been shown to be associated with ionizing radiation and it is now found to be associated with PIN in patients diagnosed after the Chernobyl nuclear accident, this suggests that long-term low dose internal ionizing radiation potentially may cause prostate cancer.  (+info)

(3/630) 8-hydroxy-2'-deoxyguanosine, a major mutagenic oxidative DNA lesion, and DNA strand breaks in nasal respiratory epithelium of children exposed to urban pollution.

Southwest metropolitan Mexico City children are repeatedly exposed to high levels of a complex mixture of air pollutants, including ozone, particulate matter, aldehydes, metals, and nitrogen oxides. We explored nasal cell 8-hydroxy-2'-deoxyguanosine (8-OHdG), a major mutagenic lesion producing G-->T transversion mutations, using an immunohistochemical method, and DNA single strand breaks (ssb) using the single cell gel electrophoresis assay as biomarkers of oxidant exposure. Nasal biopsies from the posterior inferior turbinate were examined in children in grades one through five, including 12 controls from a low-polluted coastal town and 87 Mexico City children. Each biopsy was divided for the 8-OHdG and DNA ssb assays. There was an age-dependent increase in the percentage of nasal cells with DNA tails > 10 microm in Mexico City children: 19 +/- 9% for control cells, and 43 +/- 4, 50 +/- 16, 56 +/- 17, 60 +/- 17 and 73 +/- 14%, respectively, for first through fifth graders (p < 0.05). Nasal ssb were significantly higher in fifth graders than in first graders (p < 0.05). Higher levels (2.3- to 3-fold) of specific nuclear staining for 8-OHdG were observed in exposed children as compared to controls (p < 0.05). These results suggest that DNA damage is present in nasal epithelial cells in Mexico City children. Persistent oxidative DNA damage may ultimately result in a selective growth of pr eneoplastic nasal initiated cells in this population and the potential for nasal neoplasms may increase with age. The combination of 8-OHdG and DNA ssb should be useful for monitoring oxidative damage in people exposed to polluted atmospheres.  (+info)

(4/630) Plasma jet takes off.

Thanks to a series of joint research projects by Los Alamos National Laboratory, Beta Squared of Allen, Texas, and the University of California at Los Angeles, there is now a more environmentally sound method for cleaning semiconductor chips that may also be effective in cleaning up chemical, bacterial, and nuclear contaminants. The Atmospheric Pressure Plasma Jet uses a type of ionized gas called plasma to clean up contaminants by binding to them and lifting them away. In contrast to the corrosive acids and chemical solvents traditionally used to clean semiconductor chips, the jet oxidizes contaminants, producing only benign gaseous by-products such as oxygen and carbon dioxide. The new technology is also easy to transport, cleans thoroughly and quickly, and presents no hazards to its operators.  (+info)

(5/630) Consumption and production waste: another externality of tobacco use.

OBJECTIVE: To describe the waste produced by and environmental implications of individual cigarette consumption (filter tips, packages, and cartons) and tobacco manufacturing. STUDY SELECTION: All available articles and reports published since 1970 related to cigarette consumption and production waste were reviewed. DATA SOURCES: Global cigarette consumption data were used to estimate cigarette butt and packaging waste quantities. Data from the Center for Marine Conservation's International Coastal Cleanup Project were used to describe some environmental impacts of tobacco-related trash. Data from the United States Environmental Protection Agency's (EPA's) Toxics Release Inventory and reported global cigarette consumption totals were used to estimate waste production from cigarette manufacturing. DATA EXTRACTION AND SYNTHESIS: In 1995, an estimated 5.535 trillion cigarettes (27,675 million cartons and 276,753 million packages) were sold by the tobacco industry globally. Some of the wastes from these products were properly deposited, but a large amount of tobacco consumption waste ends up in the environment. Some is recovered during environmental clean-up days. For the past eight years (1990-1997), cigarette butts have been the leading item found during the International Coastal Cleanup Project; they accounted for 19.1% of all items collected in 1997. The tobacco manufacturing process produces liquid, solid, and airborne waste. Among those wastes, some materials, including nicotine, are designated by the EPA as Toxics Release Inventory (TRI) chemicals. These are possible environmental health hazards. In 1995, the global tobacco industry produced an estimated 2262 million kilograms of manufacturing waste and 209 million kilograms of chemical waste. In addition, total nicotine waste produced in the manufacture of reduced nicotine cigarettes was estimated at 300 million kilograms. CONCLUSIONS: Laws against littering relative to cigarette butts could be better enforced. Additional taxes might be levied on cigarette products that would then be directed to environmental clean-up efforts. The tobacco industry should improve the biodegradability of filters, reduce packaging waste, and educate its customers. Worksites and public buildings should be encouraged or required to supply appropriate disposal mechanisms at all building entrances. Public awareness campaigns about the magnitude and prevention of cigarette consumption waste could be developed through partnerships among environmental groups, health organisations, and environmental protection agencies. Tobacco production waste should be a source of concern and regulation by governments throughout the world; it contains numerous chemicals which may be considered health hazards, not the least of which is nicotine produced in the manufacture of low-nicotine cigarettes.  (+info)

(6/630) Experimental studies on environmental contamination with infected blood during haemodialysis.

To assess the relative importance of different postulated modes of spread of hepatitis B in dialysis units, blood charged with various tracer organisms was used in simulated haemodialysis runs in four laboratories, and the resulting contamination of equipment and environment was measured semi-quantitatively. Some airborne spread of the tracer organism occurred when tubing containing contaminated blood was needled as the "patient" went on and came off the dialyser. Virtually no small airborne particles could be demonstrated however in simulated emergencies in which a blood line was disconnected, or even when bottles of blood were dropped on to a hard floor from a height of 2 metres. Bacillus globigii spores from contaminated blood leaked in small numbers into the dialysing fluid through apparently intact coils. T3 phage, with a particle size of the same order as hepatitis B virus, passed in small quantities through the membrane of a Kiil dialyser from blood to dialysing fluid and also in the reverse direction when added to the header tank. A number of other dialysers were also permeable to phage. Visual assessment of the appropriate moment for inserting the venous line into the "patient" at the onset of dialysis was shown to be unreliable, as the displaced fluid from the end of the venous line was already contaminated before it contained visible red blood cells. Considerable contamination of exposed surfaces and of the buttons on the proportionating unit cabinet occurred. Minor visible splashing of blood was a common-place of the laboratory experiments and was shown to be also a common event during routine haemodialysis in two of the dialysis units taking part in the studies.  (+info)

(7/630) Adhesion of biodegradative anaerobic bacteria to solid surfaces.

In order to exploit the ability of anaerobic bacteria to degrade certain contaminants for bioremediation of polluted subsurface environments, we need to understand the mechanisms by which such bacteria partition between aqueous and solid phases, as well as the environmental conditions that influence partitioning. We studied four strictly anaerobic bacteria, Desulfomonile tiedjei, Syntrophomonas wolfei, Syntrophobacter wolinii, and Desulfovibrio sp. strain G11, which theoretically together can constitute a tetrachloroethylene- and trichloroethylene-dechlorinating consortium. Adhesion of these organisms was evaluated by microscopic determination of the numbers of cells that attached to glass coverslips exposed to cell suspensions under anaerobic conditions. We studied the effects of the growth phase of the organisms on adhesion, as well as the influence of electrostatic and hydrophobic properties of the substratum. Results indicate that S. wolfei adheres in considerably higher numbers to glass surfaces than the other three organisms. Starvation greatly decreases adhesion of S. wolfei and Desulfovibrio sp. strain G11 but seems to have less of an effect on the adhesion of the other bacteria. The presence of Fe(3+) on the substratum, which would be electropositive, significantly increased the adhesion of S. wolfei, whereas the presence of silicon hydrophobic groups decreased the numbers of attached cells of all species. Measurements of transport of cells through hydrophobic-interaction and electrostatic-interaction columns indicated that all four species had negatively charged cell surfaces and that D. tiedjei and Desulfovibrio sp. strain G11 possessed some hydrophobic cell surface properties. These findings are an early step toward understanding the dynamic attachment of anaerobic bacteria in anoxic environments.  (+info)

(8/630) Caught in the middle: should the World Trade Organization settle environmental disputes?

Since its inception in 1995, the World Trade Organization (WTO) has arbitrated trade disputes between its members in part by deciding whether unilateral actions by its 134 member nations such as trade bans or restrictions violate international free trade rules and authorizing penalties against members that are found to be noncompliant with such rules. The WTO is criticized by those who believe its emphasis on free trade undermines national environmental and public health protection efforts. Recent disputes over the importation of hormone-treated beef and genetically modified crops have focused attention on how the WTO arbitrates disputes having environmental and public health implications and sparked criticisms as to whether the organization is qualified to do so.  (+info)



outcomes


  • Reviews find a likely adverse effect of air pollution on perinatal outcomes, but variation of findings hinders the ability to incorporate the research into policy. (mdpi.com)
  • The International Collaboration on Air Pollution and Pregnancy Outcomes (ICAPPO) was formed to better understand relationships between air pollution and adverse birth outcomes through standardized parallel analyses in datasets from different countries. (mdpi.com)
  • Collaboration participants have datasets with air pollution values and birth outcomes. (mdpi.com)
  • Strong enthusiasm for participating and a geographically-diverse range of participants should lead to understanding uncertainties about the role of air pollution in perinatal outcomes and provide decision-makers with better tools to account for pregnancy outcomes in air pollution policies. (mdpi.com)

exposure


  • For all cohort members, exposure to traffic-related air pollution assessed as nitrogen dioxide (NO 2 ) and nitrogen oxides (NO x ) was estimated at all present and past residential addresses from 1984 to 2011 using a validated dispersion model. (nih.gov)
  • We studied the association between DNA methylation and short- and mid-term air pollution exposure using genome-wide data and identified potential biological pathways for additional investigation. (nih.gov)

pregnancy


effects


  • The few studies conducted on short-term effects of air pollution on episodes of atrial fibrillation indicate a positive association, though not consistently. (nih.gov)

assessment


  • 3) the inclusion of demolition works as a category of development that may require environmental impact assessment. (environmental-expert.com)
  • In Ireland, environmental impact assessment (EIA) forms part of the planning permission process. (environmental-expert.com)
  • In the present study, a life cycle assessment (LCA) approach was used to analyse the environmental impacts associated with the construction and operational phases of an integrated fixed-film activated sludge (IFAS) reactor treating municipal wastewater. (environmental-expert.com)

general


  • The aim of this study was to evaluate the long-term impact of traffic-related air pollution on incidence of atrial fibrillation in the general population. (nih.gov)

factors


  • Abstract Environmental factors control the rate of nitrification. (environmental-expert.com)
  • For a determined substrate concentration, the most significant environmental factors are temperature, pH and oxygen availability. (environmental-expert.com)

likely


  • Are my issues more likely genetic or environmental? (medhelp.org)

Department


  • The present work on the U.S. Department of Veterans Affairs (VA) Normative Aging Study has been supported by funding from the U.S. National Institute of Environmental Health Sciences, National Institutes of Health (R0 1ES015172, R0 1ES021733). (nih.gov)

project


  • This study was conducted within the boundaries of a research project that aimed to investigate the implementation related challenges of a package type IFAS reactor from an environmental perspective. (environmental-expert.com)

levels


  • Noise pollution is not only an annoyance, but at sufficiently high levels, it may cause loss of hearing. (expertsmind.com)