• The inorganic compounds are considered more poisonous than the organic arsenic compounds. (naturvardsverket.se)
  • Arsenic is regulated by the UN Convention on Long-range Transboundary Air Pollution (CLRTAP) and the EU Air Quality Directive (2008/50/EC), the EU Groundwater Directive (2006/118/EC), the EU Drinking Water Directive (98/83/EC), the EU Industrial Emissions Directive (2010/75/EU) and the EU Regulation as regards maximum levels of inorganic arsenic in foodstuffs (EU 2015/1006). (naturvardsverket.se)
  • Arsenic compounds exist in a number of inorganic and organic forms. (cdc.gov)
  • Other inorganic arsenic compounds may vary somewhat in relative toxicity, and organic arsenic compounds appear to be essentially nontoxic. (cdc.gov)
  • the guidelines for decontamination and medical treatment are applicable for exposure to arsenic and inorganic arsenic compounds, including arsenic trioxide. (cdc.gov)
  • Arsenic occurs naturally in soil and many kinds of rock (especially minerals and ores that contain copper and lead) as inorganic arsenic. (cdc.gov)
  • Inorganic arsenic compounds have been used as pesticides, but can no longer be used in agriculture. (cdc.gov)
  • OSHA PEL (permissible exposure limit) = 10 µg/m 3 as an 8-hour TWA concentration (as As) for inorganic arsenic (OSHA 2006). (cdc.gov)
  • In Minamata Bay, a factory discharged inorganic mercury into the water. (medscape.com)
  • In Jan. 2007, Science News reported that bacteria in chicken litter are converting the organic arsenic residue in the chicken manure to inorganic arsenic, far faster than previously thought. (blogspot.com)
  • The inorganic arsenic dissolves into soils and surface water, and can then enter garden produce that was fertilized with arsenic contaminated chicken manure, and drinking water gets contaminated from farm runoff. (blogspot.com)
  • Inorganic arsenic is far more poisonous and carcinogenic than the organic arsenics that are fed to the chickens. (blogspot.com)
  • acceptedAnswer": {"@type": "Answer", "text": "Inorganic arsenic compounds are found in soils, sediments, and groundwater. (kahveciogluinsaat.com.tr)
  • Some forms of arsenic (inorganic arsenic) can have serious side effects. (kahveciogluinsaat.com.tr)
  • It can be divided into inorganic arsenic and natural and organic arsenic compounds. (oumiss.com)
  • Inorganic arsenic is harmful to the human body and can lead to arsenicosis. (oumiss.com)
  • Aresenicosis is persistent arsenic poisoning and can consider several years to diagnose relying on the level of inorganic arsenic taken about time. (oumiss.com)
  • Some organic arsenic compounds may be used as pesticides or as additives in animal feed. (cdc.gov)
  • Natural and organic arsenic compounds are a lot safer, and exposure does not cause extreme diseases. (oumiss.com)
  • Arsenic is classified as carcinogenic and long-term exposure may cause tumours on the skin, lungs, liver, kidneys, prostate and urine bladder. (naturvardsverket.se)
  • This poisonous element is a powerful carcinogenic, which has been linked to an increased risk of the development of several types of cancer. (aginglater.com)
  • Arsenic occurs naturally in various minerals worldwide. (naturvardsverket.se)
  • Arsenic occurs naturally. (snexplores.org)
  • Naturally occurring contaminants found in soils and bedrock, like arsenic and uranium, can find their way in your drinking water. (healthvermont.gov)
  • Note that free range chicken tends to be naturally more coloured, a colouration that is attempted to be copied by lacing the meats with arsenic. (blogspot.com)
  • Arsenic is a poisonous substance, which is released both from certain human activities and naturally from the earth's crust. (greenfacts.org)
  • Acid water can be naturally occurring, or caused by a high level of dissolved oxygen. (dewdon.com)
  • Also called the RCRA 8s, these metals are Arsenic (As) , Barium (Ba) , Cadmium (Cd) , Chromium (Cr) , Lead (Pb) , Mercury (Hg) , Selenium (Sg) , and Silver (Ag) . (actenviro.com)
  • These chemicals can include arsenic and cadmium. (wrightplacetv.com)
  • Heavy metals such as lead, mercury, aluminum, arsenic, cadmium, are natural metallic elements (with high atomic weight) but over the years, multiple and intense use of these metals in agriculture, medical, cosmetics and other industries have caused high concentrations of these in immediate human surroundings. (gettinghealthier.com)
  • If one consumes a certain amount of Arsenic, it can become quite toxic. (actenviro.com)
  • Two hours later, a luminometer reveals the amount of arsenic in each sample. (acs.org)
  • But the amount of arsenic that is present in water is not the same everywhere. (mytapwater.org)
  • Compared to adults, children have the habit of consuming more water with respect to their unit body weight, and thus, they are exposed to a higher amount of arsenic. (mytapwater.org)
  • Arsenic trioxide (an odorless, tasteless, white or transparent, nonflammable solid) is one of the most toxic and prevalent forms of arsenic. (cdc.gov)
  • nonflammable solid) is one of the most toxic and prevalent forms of arsenic. (cdc.gov)
  • Arsenic toxicity. (naturvardsverket.se)
  • Assessment of arsenic toxicity in animal and plant models: a review. (naturvardsverket.se)
  • The toxicity of a particular arsenic compound depends in part on its solubility. (cdc.gov)
  • Arsenic trioxide dust is readily absorbed from the lungs, but inhaled quantities are usually insufficient to cause acute systemic toxicity. (cdc.gov)
  • Contaminated soil may also be a source of significant arsenic exposure in children, although it is not likely that children would ingest sufficient arsenic-contaminated soil to cause significant acute toxicity. (cdc.gov)
  • Mercury in any form is poisonous, with mercury toxicity most commonly affecting the neurologic, gastrointestinal (GI) and renal organ systems. (medscape.com)
  • Water containing arsenic can induce crops to include the mineral, resulting in toxicity when ingested. (oumiss.com)
  • Arsenic toxicity occurs through contaminated ground water, soil and seafood from coastal waters. (gettinghealthier.com)
  • Some estimates suggest "more than 13 million workers in the United States are potentially exposed to chemicals that can be absorbed through the skin. (weitzlux.com)
  • For example, a Pennsylvania law has even issued a "gag order" on physicians, nurses, and other health care providers, which prohibits them from telling patients or other providers the chemicals that patients may have been exposed to. (environmentamerica.org)
  • But these disinfectants also can react with other chemicals in the water. (snexplores.org)
  • They are so widely used that these chemicals have been showing up in water. (snexplores.org)
  • Are there dangerous chemicals to which we can be exposed? (yummymummyclub.ca)
  • They also contain nicotine however they lack some of the poisonous chemicals found in regular cigarettes. (wrightplacetv.com)
  • In some cases, merchants and advertisers have unknowingly exposed thousands of people to dangerous chemicals, such as selling water laced with radium as a cure for ailments of the endocrine system. (listverse.com)
  • Every day scientists uncover new information about the chemicals we're exposed to and their potential links to illness. (eartheasy.com)
  • Find out on what damage they are doing and learn more on how water filtration can help removing these harming chemicals. (chansonalkalinewater.com)
  • Chloroform (a Trihalomethane or THM) and trichloroethylene (TCE) are two highly volatile toxic chemicals that have been identified in many municipal drinking-water supplies. (chansonalkalinewater.com)
  • In addition, industrial workers are often exposed to toxic and irritating chemicals, which can contribute to asthma. (chansonalkalinewater.com)
  • Simply put, fracking is a process whereby water is combined with sand and chemicals and injected at high pressure into the ground, in order to fracture the shale rocks and therefore release the natural gases . (anhinternational.org)
  • And, if you find yourself struggling with the environmental concerns of bottled water versus the dangerous chemicals in tap water, I understand. (aginglater.com)
  • Petroleum chemicals are being present in the waters poisoning the fishes, crabs, and other inhabitants. (ourendangeredworld.com)
  • Until today there are still health warnings in consuming fisheries from most of this river because these fishes are contaminated due to these illegal dumps of poisonous petroleum chemicals and other toxic chemicals, which makes this river one of the most polluted rivers in America. (ourendangeredworld.com)
  • A psychological operation was developed to tell the people that the chemicals were not dangerous and contaminated food and water was safe to ingest. (psywarrior.com)
  • By the time Bush departed his job as governor of Texas in December 2000, Texas had - according to a report from within the ranks of his own party - become the number-one state in the nation in manufacturing-plant emissions of toxic chemicals, in the release of industrial airborne toxins, in violations of clean water discharge standards and the release of toxic waste into underground wells. (minesandcommunities.org)
  • Every day you face the possibility of toxic chemical exposure - through the air you breathe, the water you drink, or the products you buy. (weitzlux.com)
  • But inhalation is not the only way someone can be exposed to and made sick by chemical exposure. (weitzlux.com)
  • Adverse health effects caused by lewisite depend on the amount people are exposed to, the route of exposure, and the length of time that people are exposed. (cdc.gov)
  • Ingestion is the most important route of acute exposure of arsenic trioxide. (cdc.gov)
  • Is Arsenic Exposure Dangerous? (mytapwater.org)
  • Yes, exposure to arsenic is dangerous. (mytapwater.org)
  • In some cases, arsenic exposure is also found to cause changes in the skin. (mytapwater.org)
  • Certain factors like the duration of exposure to arsenic, the dosage of arsenic, and the manner in which you are exposed play a great role. (mytapwater.org)
  • Studies by Dr. Julian Andelman, Professor of Water Chemistry, University of Pittsburgh Graduate School of Public Health, found less chemical exposure from drinking chlorine contaminated water than using it to wash the clothes or take a shower. (chansonalkalinewater.com)
  • Assessments of drinking water safety rely on the assumption that ingestion represents the principle route of exposure. (chansonalkalinewater.com)
  • The researchers concluded that skin absorption of contaminants in municipal water has been underestimated and that ingestion may not constitute the sole or even primary route of exposure. (chansonalkalinewater.com)
  • To what extent can arsenic exposure affect human health or the environment? (greenfacts.org)
  • In certain cases, ingested lead may leave a metallic taste in your tongue, however this is not always the case.You can become exposed to lead dust if you come into touch with it.Some research has discovered that lead may be absorbed via the skin.1 Lead exposure is possible if you handle the metal then contact your eyes or nose or mouth thereafter. (virginialeenlaw.com)
  • Besides, depending on chemical species, its dose, route and period (acute or chronic) of exposure, the effect of heavy metal poisoning is greatly influenced by personal characteristics of the exposed individuals such as age, gender, genetics, individual susceptibilities and nutritional status. (gettinghealthier.com)
  • Arsenic trioxide is produced during the smelting of ores that contain arsenic. (cdc.gov)
  • Always follow up on the recommendations and rules set by the FDA to know which food substances or other products contain arsenic. (mytapwater.org)
  • However, they soon discovered that, even in minuscule amounts, the substances caused distressing symptoms in humans exposed to them. (homelandsecuritynewswire.com)
  • The toxic substances you take into your body from tap water will have a negative effect on the development of your unborn child. (aginglater.com)
  • Experts can use air to treat water and remove harmful substances. (cdc.gov)
  • Substances we take in through food and water or through the air we breathe may influence our health. (greenfacts.org)
  • Even a tiny intake of poisonous substances such as lead, mercury, arsenic, and others could cause complications. (personalabs.com)
  • If you were exposed to these hazardous substances, you need to get tested immediately. (personalabs.com)
  • A polluted river can be defined as a water body that contains components that result in contaminated water quality, which is not suitable for drinking or other natural resource utilization due to the presence of pollutant substances like hydrocarbons, solvents, sedimentation. (ourendangeredworld.com)
  • Because of the high concentrations of dissolved solids, nitrates, arsenic, lead, and disease-causing bacteria in dirty water, many locals become sick from water-borne illnesses. (way2smile.com)
  • Untreated water can host plenty of harmful bacteria and viruses. (snexplores.org)
  • Their test uses technology they previously developed: genetically engineered Escherichia coli bacteria, whose natural arsenic-detecting defense gene turns on an added gene for a luminescent enzyme. (acs.org)
  • When arsenic invades the cell, the engineered bacteria glow in proportion to the quantity of arsenic. (acs.org)
  • Bacteria are hurt by arsenic too. (blogspot.com)
  • The concept of terrain suggests that it's not a question of being exposed to bacteria. (cellcore.com)
  • Humans can be unknowingly exposed to Barium through well water supplies and oil refineries as well. (actenviro.com)
  • In today's world, humans are increasingly exposed to unwanted toxins due to exponentially Igrowing urbanisation, industrialisation and other anthropogenic sources. (healthcareontime.com)
  • Airborne lead can be deposited in soil and water, thus reaching humans via the food chain. (healthcareontime.com)
  • Humans may be exposed to arsenic mainly through food and water. (greenfacts.org)
  • Some herbal products have been found to contain high levels of toxic heavy metals such as arsenic, lead, or mercury. (cdc.gov)
  • After testing underground water in Jixi's Liumao Village in Heilongjiang Province, researches found mercury levels nine times the national standard, reported China Central Television. (naturalnews.com)
  • toxic elements have found their way into food, water, air and soil because of their deliberate uses for decades. (healthcareontime.com)
  • The spilled chemical was taken up by the soil, just like a sponge absorbs water. (cdc.gov)
  • Carrot Root vegetables can also draw arsenic from the soil. (kahveciogluinsaat.com.tr)
  • The work reviews data on environmental and health impacts of mining such as pollution of water bodies, degradation of forest resources, depletion of soil nutrients, destruction of wildlife habitat, and reduction in quality and threats to human health. (allenpress.com)
  • Small quantities of arsenic metal are used in alloys in products such as lead-acid batteries. (cdc.gov)
  • Anyone can swallow or be exposed to lead dust and become poisoned, but young children, pregnant people, and pets are especially at risk. (healthvermont.gov)
  • Crystals are beautiful creations of nature and have been used widely since ancient times for their beauty and healing properties but not all crystals are completely safe some minerals contain toxic material, such as copper, lead, iron, zinc, sulfur, asbestos, and arsenic which under certain conditions can be harmful when in contact with or ingested . (youaremymagic.com)
  • When it comes to casting their own goods, such as lead bullets and lead fishing sinkers, and other lead ballast applications, many aficionados choose to acquire raw lead ingots.When working with lead, extreme caution should be exercised.If you are melting lead or casting lead items, you and others in the region may be exposed to lead, which has been identified as a potential health concern. (virginialeenlaw.com)
  • Because lead fumes and lead dust do not have a distinct odor, you may be unaware that you are being exposed to lead. (virginialeenlaw.com)
  • You can become exposed to lead dust if you inhale it. (virginialeenlaw.com)
  • How can you be exposed to lead? (virginialeenlaw.com)
  • Taking in lead dust while eating, drinking, or smoking in an area where lead is being processed or stored is a serious health risk. (virginialeenlaw.com)
  • The combustion of fuel produces poisonous fumes, including lead oxides. (virginialeenlaw.com)
  • If this occurs, it is probable that you may bring part of the lead dust home with you, potentially exposing your family to lead dust. (virginialeenlaw.com)
  • Though, efforts have been made to limit its use in gasoline, residential paints, food, drink cans and plumbing systems, still it is a serious health problem, as lead is the most systemic toxicant that affects almost all organs in the body. (gettinghealthier.com)
  • You can't see, taste or smell most harmful contaminants in drinking water. (healthvermont.gov)
  • If you come into contact with more than one harmful substance, you can become sicker than if you were just exposed to one substance. (cdc.gov)
  • As with arsenic and many other elements, it can be harmful under some circumstances. (virginialeenlaw.com)
  • To prevent remaining exposed to this harmful chemical, we need to have to operate to working with solvents that are benzene free of charge. (oumiss.com)
  • The major question on everyone's mind right now is that if arsenic is a poisonous and toxic substance, what leads to the presence of it in water in the first place? (mytapwater.org)
  • Consider "the amount of a substance that is not likely to harm people who are exposed every day for a lifetime. (cdc.gov)
  • However, almost any substance ingested in sufficiently large quantities can be toxic (poisonous). (msdmanuals.com)
  • According to John Hopkin Bloomberg School of Public Health , the US EPA estimates that 70% of commercial chickens raised in the US were fed arsenic since the 1940's, and 80% market share for arsenic additives in animal feed are from Roxarsone brand organic arsenic . (blogspot.com)
  • Arsenic trioxide has no odor and thus provides no warning of hazardous airborne concentrations. (cdc.gov)
  • Arsenic has been used within agriculture as a pesticide and as wood preservative to increase the lifespan of wood. (naturvardsverket.se)
  • A proportional injection system uses a chemical feed pump to inject a precise amount of water neutralizer solution into the water. (dewdon.com)
  • 10/3/2016 - Chemical fertilizers are destroying our supplies of clean water by feeding blooms of toxic algae, scientists and water officials have warned. (naturalnews.com)
  • In this context, only arsenic and antimony are semimetals, and commonly recognised as metalloids. (wikipedia.org)
  • Plant and Shrub Poisoning Only a few commonly grown plants are very poisonous, but many others have less serious toxic effects. (msdmanuals.com)
  • Laboratory scale models were evaluated in respect of selected heavy metals, bacterial and particulate removal when exposed to surface water for five months. (iwaponline.com)
  • There are a lot of places where arsenic is found. (mytapwater.org)
  • You may have heard how aluminum increases your risk for Alzheimer's disease , but did you also know that the aluminum found in your municipal water supply can cause a wide variety of other health problems? (aginglater.com)
  • Later, arsenic was found to be a carcinogen, yet the FDA continued to allow it to be used in animal feeds as Big Ag could earn more profits if they used arsenic. (blogspot.com)
  • In 1977, BC Broiler Marketing Board seized 40,000 kg of US chicken that was found to be laced with arsenic from Roxarsone in the chicken feed, declaring that Canadian chicken was better, and therefore US imports ought to be banned from Canada. (blogspot.com)
  • for, after all their prayers and fastings, they found that the eggs of the poisonous serpents were hatched in the muck-heaps that surrounded their own dwellings. (philipneal.net)
  • The psychiatrists tout the value of this prescription neurotoxin-including as a natural cure found in drinking water. (naturalnewsblogs.com)
  • If youstill believe fluoride in your drinking water prevents cavities and helps build strong teeth, you've fallen for a cleverly devised mass-deception. (aginglater.com)
  • Persons whose clothing or skin is contaminated with arsenic may secondarily contaminate others by direct contact or through release of inhalable dust. (cdc.gov)
  • Direct contact with arsenic trioxide dust can cause localized skin irritation, but systemic absorption through the skin is negligible. (cdc.gov)
  • Hence it is poisonous to touch Malachite dust or powder in its raw form. (youaremymagic.com)
  • Raw Malachite is quite poisonous as it contains copper minerals in a very high percentage ( approximately 58% ). (youaremymagic.com)
  • Acidic waters are typically low in buffering calcium minerals, but are high in dissolved carbon dioxide, which can cause the low pH or acidity. (dewdon.com)
  • Water can also be contaminated by human activity, like manure from farm fields, leachate from septic systems, or runoff from road salt. (healthvermont.gov)
  • Arsenic is a well-known poison that may severely affect the environment and health. (naturvardsverket.se)
  • Arsenic, is a type of material that is most known to be used as a poison, especially in the olden days. (actenviro.com)
  • In spite of arsenic being a known acute poison, 3-Nitro® (Roxarsone), NADA 005-414, a drug used for agricultural feeds for chicken and pork, was approved by the FDA on March 21, 1944. (blogspot.com)
  • If you suspect that you have been exposed to poison and are experiencing some symptoms like fatigue, nausea, dehydration, or vomiting, you might want to stick around and learn more about this condition. (personalabs.com)
  • Try to consume different types of foods so that you are not exposed to greater quantities of arsenic through any single type of food. (mytapwater.org)
  • Elemental arsenic is usually a steel grey metal-like material without characteristic taste or smell. (cdc.gov)
  • Showing these signs and symptoms does not necessarily mean that a person has been exposed to lewisite. (cdc.gov)
  • If so, how do you know the strange symptoms you've been experiencing are not due to ingesting small doses of the drugs you're allergic to from the water? (aginglater.com)
  • You may be told that plenty of water, a light snack, and carefully watching for symptoms to appear is the best approach if only a small amount of perfume has been consumed. (healthline.com)
  • Mushroom (Toadstool) Poisoning Many species of mushroom are poisonous and can cause different symptoms depending on the type of mushroom. (msdmanuals.com)
  • Limit values for arsenic in drinking water is also regulated in the provision of the Swedish National Food Agency. (naturvardsverket.se)
  • You can be exposed to arsenic through industrial processes, contaminated food, or even your water. (weitzlux.com)
  • If lewisite liquid comes into contact with food, people may be exposed by eating the contaminated food. (cdc.gov)
  • But the most common way in which every person is exposed to arsenic in our day-to-day lives is through the presence of arsenic in water and food. (mytapwater.org)
  • Some of the major toxic elements are discussed here for your knowledge, that could get into your body through food, water or air and mingle with your blood to slowly ruin your lungs , your brain and most importantly, your life. (healthcareontime.com)
  • Arsenic in food and drink can be a big problem, causing poisoning and cancer. (blogspot.com)
  • Contaminated water used for drinking, food preparation and irrigation of food crops poses the greatest threat to public health from arsenic. (kahveciogluinsaat.com.tr)
  • It forms readily when elemental metallic arsenic is heated to high temperatures or burned. (cdc.gov)
  • Overexposure may result from relatively high levels of arsenic in drinking water and foods. (cdc.gov)
  • The lake bed contains high levels of arsenic and as more of it becomes exposed, wind storms carry that arsenic into the lungs of nearby residents, who make up three-quarters of Utah's population. (balloon-juice.com)
  • It is also known to be present in tobacco smoke, which research shows to have high concentrations of Arsenic. (actenviro.com)
  • That is why arsenic has been shown to prevent infections in the high density, cheek to jowl chicken factories. (blogspot.com)
  • If your water has a low pH, meaning that you have high water acidity, you may see blue-green stains on your plumbing fixtures, faucets, and drains, as well as on bathtubs and sinks. (dewdon.com)
  • Arsenic is a concern for the two in every 15 U.S. residents who draw their drinking water from private wells instead of city water systems. (snexplores.org)
  • Arsenic in water is a cause of concern, but advanced testing methods in today's will help you take the necessary precautionary measures. (mytapwater.org)
  • Many people also find that low pH water has a sour or metallic taste (because of the dissolved metals). (dewdon.com)
  • But constantly wearing it without cleansing may cause the sweat on your body to react with the stone causing some reactions from copper in the stone and making the malachite poisonous. (youaremymagic.com)
  • Acid in water can even cause pinhole leaks in copper plumbing. (dewdon.com)
  • The biggest health problem with acid water is related to copper pipes. (dewdon.com)
  • Acid in water can dissolve some of the copper from the pipes, where it can be consumed in drinking water. (dewdon.com)
  • Arsenic is emitted to the environment during combustion of fossil fuels, leaching from arsenic-contaminated ground or from landfills, and by emissions from wastewater treatment plants. (naturvardsverket.se)
  • As I mentioned in this previous article , water that drains through landfills, known as leach rate, eventually ends up in rivers. (aginglater.com)
  • It causes people to use pesticides to make a certain way, it requires wasting water on it so you can waste gasoline to cut it and emit co2 gasses. (balloon-juice.com)
  • Despite these impacts, fracking is exempt from key provisions of the nation's leading public health and environmental laws, including the Safe Drinking Water Act, the Clean Water Act, the Clean Air Act, and the Resource Conservation and Recovery Act, the law that regulates hazardous waste. (environmentamerica.org)
  • The leading causes of pollution in this river are caused by sewage, city waste, and agricultural wastes like arsenic. (ourendangeredworld.com)
  • Some drugs that were never meant to be combined are mixed together in the drinking water you consume every day. (aginglater.com)
  • Most tap community water supplies are treated with chlorine and although it may not be the healthiest element you can consume, it is far better for you than what is left behind. (aginglater.com)
  • When there are rains, it doesn't retain the water like other plants and vegetation would, and runs off into the gutters and gullies carrying all those pesticides into rivers, streams, and wastewater stations. (balloon-juice.com)
  • An estimated 2 million people or more in the United States may be exposed to levels of arsenic above the federal limit of 10 parts per billion. (snexplores.org)
  • For more information, see the USGS website , which offers maps showing where and to what extent arsenic occurs in ground water across the United States. (aginglater.com)
  • Because of its corrosive nature, this water could contain elevated levels of toxic metals, damage metal pipes. (dewdon.com)
  • In May 2006, Health Canada lowered the Canadian Drinking Water Quality Guidelines to 10 ug/L (millionth of a gram per litre) based on recent information on the carcinogenicity of ingested arsenic. (blogspot.com)
  • Those workers at highest risk include people who are exposed to latex, such as health-care professionals, as well as people exposed to animals, such as veterinarians. (chansonalkalinewater.com)
  • Terrain theory explains why sometimes, several people who are "exposed" to the same disease or conditions don't have the same reaction and don't get sick. (cellcore.com)