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English Wikipedia references for Epa.gov 1-50 of 2643
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| Asphalt Asphalt () is a sticky, black and highly viscous liquid or semi-solid that is present in most crude petroleums and in some natural deposits sometimes termed asphaltum. It is most commonly modelled as a colloid, with asphaltenes as the dispersed phase and maltenes as the continuous phase (though there is some disagreement amongst chemists regarding its structure). Asphalt | |
| Alpha decay Alpha decay is a type of radioactive decay in which an atomic nucleus emits an alpha particle (two protons and two neutrons bound together into a particle identical to a helium nucleus) and transforms (or 'decays') into an atom with a mass number 4 less and atomic number 2 less. For example Alpha_decay | |
| Ann Arbor, Michigan Ann Arbor is a city in the U.S. state of Michigan and the county seat of Washtenaw County. It is the state's seventh largest city with a population of 114,024 as of the 2000 Census, of which 36,892 (32%) are university or college students. The city, which is part of the Detroit-Ann Arbor-Flint, MI CSA, is named after the spouses of the city's founders and for the stands of trees in the area. Ann_Arbor,_Michigan | |
| American Airlines American_Airlines | |
| Atlanta Atlanta | |
| Attribution of recent climate change Attribution of recent climate change is the effort to scientifically ascertain mechanisms responsible for relatively recent changes observed in the Earth's climate. The effort has focused on changes observed during the period of instrumental temperature record, when records are most reliable; particularly on the last 50 years, when human activity has grown fastest and observations of the upper atmosphere have become available. Attribution_of_recent_climate_change | |
| Acid rain Acid rain is rain or any other form of precipitation that is unusually acidic. It has harmful effects on plants, aquatic animals, and infrastructure. Acid rain is mostly caused by human emissions of sulfur and nitrogen compounds which react in the atmosphere to produce acids. In recent years, many governments have introduced laws to reduce these emissions. Acid_rain | |
| Barium Barium () is a chemical element. It has the symbol Ba, and atomic number 56. Barium is a soft silvery metallic alkaline earth metal. It is never found in nature in its pure form due to its reactivity with air. Its oxide is historically known as baryta but it reacts with water and carbon dioxide and is not found as a mineral. The most common naturally occurring minerals are the very insoluble barium sulfate, BaSO4 (barite), and barium carbonate, BaCO3 (witherite). Benitoite is a rare gem containing barium. Barium | |
| Bald Eagle The Bald Eagle (Haliaeetus leucocephalus) is a bird of prey found in North America that is most recognizable as the national bird and symbol of the United States of America. This sea eagle has two known sub-species and forms a species pair with the White-tailed Eagle. Its range includes most of Canada and Alaska, all of the contiguous United States and northern Mexico. It is found near large bodies of open water with an abundant food supply and old-growth trees for nesting. Bald_Eagle | |
| Transgenic maize Transgenic maize (corn) has been deliberately genetically modified to have agronomically desirable traits. Traits that have been engineered into corn are resistance to herbicides and incorporation of a gene that codes for the Bacillus thuringiensis (Bt) toxin, protecting plants from insect pests. Hybrids with both herbicide and pest resistance have also been produced. Transgenic maize is currently grown commercially in the United States. Transgenic_maize | |
| Chemical equilibrium In a chemical process, chemical equilibrium is the state in which the chemical activities or concentrations of the reactants and products have no net change over time. Usually, this would be the state that results when the forward chemical process proceeds at the same rate as their reverse reaction. Chemical_equilibrium | |
| Concrete Concrete is a construction material composed of cement (commonly Portland cement) as well as other cementitious materials such as fly ash and slag cement, aggregate (generally a coarse aggregate such as gravel, limestone, or granite, plus a fine aggregate such as sand), water, and chemical admixtures. The word concrete comes from the Latin word "concretus" (meaning compact or condensed), the past participle of "concresco", from "com-" (together) and "cresco" (to grow). Concrete | |
| Columbia River The Columbia River (known as Wimahl or Big River to the Chinook-speaking natives who lived on its lowermost reaches) is the largest river in the Pacific Northwest region of North America. It is named after the Columbia Rediviva, the first ship from the western world known to have traveled up the river. It stretches from British Columbia through Washington state, forming much of the border between Washington and Oregon before emptying into the Pacific Ocean. The river is long, and its drainage basin is . Columbia_River | |
| Cadmium Cadmium () is a chemical element with the symbol Cd and atomic number 48. The soft, bluish-white transition metal is chemically similar to the two other metals in group 12 , zinc and mercury. Similar to zinc it prefers oxidation state +2 in most of its compounds and similar to mercury it shows a low melting point for a transition metal. Cadmium is a relatively abundant element. Cadmium was discovered in 1817 by Friedrich Strohmeyer as an impurity in zinc carbonate. Cadmium | |
| Columbia River Talk:Columbia_River | |
| Carbon dioxide Carbon dioxide (chemical formula:chemical compound composed of two oxygen atoms covalently bonded to a single carbon atom. It is a gas at standard temperature and pressure and exists in Earth's atmosphere in this state.Carbon dioxide is used by plants during photosynthesis to make sugars which may either be consumed again in respiration or used as the raw material to produce polysaccharides such as starch and cellulose, proteins and the wide variety of other organic compounds required for plant growth and development. Carbon_dioxide | |
| Catalysis Catalysis is the process in which the rate of a chemical reaction is either increased or decreased by means of a chemical substance known as a catalyst. Unlike other reagents that participate in the chemical reaction, a catalyst is not consumed by the reaction itself. Catalysis | |
| Compost Compost ( or US ) is a combination of food waste and brown waste that is being decomposed through aerobic decomposition into a rich black soil. The process of composting is simple and practiced by individuals in their homes, farmers on their land, and industrially by cities. Compost | |
| Carbon sink carbon sink is a natural or manmade reservoir that accumulates and stores some carbon-containing chemical compound for an indefinite period.The main natural sinks are Absorption of carbon dioxide by the oceans Photosynthesis by plants and algae The main manmade sinks are Landfills Carbon capture and storage proposals Carbon_sink | |
| Carbon monoxide Carbon monoxide, with the chemical formula CO, is a colorless, odorless and tasteless, yet highly toxic gas. Its molecules consist of one carbon atom and one oxygen atom, connected by a covalent double bond and a dative covalent bond. It is the simplest oxocarbon, and can be viewed as the anhydride of formic acid (CH2O2).Carbon monoxide is produced from the partial oxidation of carbon-containing compounds; it forms in preference to the more usual carbon dioxide (CO2) when there is a reduced availability of oxygen, such as when operating a stove or an internal combustion engine in an enclosed space. Carbon_monoxide | |
| Clean Air Act (1970) Clean Air Act Extension of 1970 (84 Stat. 1676, Public Law 91-604) is a United States federal law that requires the Environmental Protection Agency (EPA) to develop and enforce regulations to protect the general public from exposure to airborne contaminants that are known to be hazardous to human health. Clean_Air_Act_(1970) | |
| Cadillac, Michigan Cadillac () is a city in the U.S. state of Michigan and is the county seat of Wexford County. As of the 2000 census, the city population was 10,000. The city is situated at the junction of US 131, M-55 and M-115. Approximately five miles north-northwest of Cadillac lies the geographic center of Michigan.Cadillac became the county seat after the so-called "Battle of Manton," in which a show of force was involved in enforcing a controversial decision to move the county seat from Manton, Michigan. Cadillac,_Michigan | |
| Choctaw The Choctaw are a Native American people originally from the Southeastern United States (Mississippi, Alabama, and Louisiana). They are of the Muskogean linguistic group. The word Choctaw (alternatively spelt as Chahta, Chactas, Chato, Tchakta, and Chocktaw) may derive from the Castilian word chato, meaning flat; however, noted anthropologist John Swanton suggested that the name was derived from a Choctaw leader. Choctaw | |
| Delaware Delaware | |
| Drink A drink, or beverage, is a liquid specifically prepared for human consumption. In addition to basic needs, beverages form part of the culture of human society. Drink | |
| DDT DDT | |
| Diesel engine A diesel engine is an internal combustion engine that operates using the diesel cycle (named after Dr. Rudolph Diesel). Diesel engines have the highest thermal efficiency of any internal or external combustion engine, because of their compression ratio.The defining feature of the diesel engine is the use of the heat of compression to initiate ignition to burn the fuel, which is injected into the combustion chamber during the final stage of compression. Diesel_engine | |
| Detroit River The Detroit River is a 32 mile (51 km) long river in the Great Lakes system. The name comes from the French Rivière du Détroit, which translates literally as River of the Strait. The Detroit River has served an important role in the history of Detroit and is one of the busiest waterways in the world. Detroit_River | |
| Erin Brockovich Talk:Erin_Brockovich | |
| Ethanol Ethanol, also called ethyl alcohol, pure alcohol, grain alcohol, or drinking alcohol, is a volatile, flammable, colorless liquid. It is a psychoactive drug, best known as the type of alcohol found in alcoholic beverages and in modern thermometers. Ethanol is one of the oldest recreational drugs. Ethanol | |
| Exxon Valdez oil spill The Exxon Valdez oil spill occurred in the Prince William Sound, Alaska, on March 24, 1989. It is considered one of the most devastating human-caused environmental disasters ever to occur at sea. As significant as the Exxon Valdez spill was, it ranks well down on the list of the world's largest oil spills in terms of volume released. Exxon_Valdez_oil_spill | |
| Great Lakes Great Lakes are a chain of freshwater lakes located in eastern North America, on the Canada – United States border. Consisting of Lakes Superior, Michigan, Huron, Erie, and Ontario, they form the largest group of freshwater lakes on Earth. They are sometimes referred to as the "Third Coast" by some citizens of the United States. Because of their size, some regard them as inland seas. Great_Lakes | |
| General Motors General_Motors | |
| Gold Gold () is a chemical element with the symbol Au () and an atomic number of 79. It is a highly sought-after precious metal in jewelry, in sculpture, and for ornamentation since the beginning of recorded history. The metal occurs as nuggets or grains in rocks, in veins and in alluvial deposits. Gold | |
| Greenhouse effect greenhouse effect is the heating of the surface of a planet or moon due to the presence of an atmosphere containing gases that absorb and emit infrared radiation. Greenhouse gases, which include water vapor, carbon dioxide and methane, are almost transparent to solar radiation but strongly absorb and emit infrared radiation. Greenhouse_effect | |
| General Electric General_Electric | |
| Global warming potential Global warming potential (GWP) is a measure of how much a given mass of greenhouse gas is estimated to contribute to global warming. It is a relative scale which compares the gas in question to that of the same mass of carbon dioxide (whose GWP is by definition 1). A GWP is calculated over a specific time interval and the value of this must be stated whenever a GWP is quoted or else the value is meaningless. Global_warming_potential | |
| Global warming controversy The global warming controversy is a dispute regarding the nature, causes, and consequences of global warming. The disputed issues include the causes of increased global average air temperature, especially since the mid-20th century, whether this warming trend is unprecedented or within normal climatic variations, and whether the increase is wholly or partially an artifact of poor measurements. Global_warming_controversy | |
| Hydrogen Hydrogen () is the chemical element with atomic number 1. It is represented by the symbol H. At standard temperature and pressure, hydrogen is a colorless, odorless, nonmetallic, tasteless, highly flammable diatomic gas with the molecular formula H2. With an atomic weight of , hydrogen is the lightest element.Hydrogen is the most abundant chemical element, constituting roughly 75% of the universe's elemental mass. Hydrogen | |
| Honda Honda | |
| Hydroponics Hydroponics (from the Greek words hydro water and ponos labor) is a method of growing plants using mineral nutrient solutions, without soil. Terrestrial plants may be grown with their roots in the mineral nutrient solution only or in an inert medium, such as perlite, gravel, or mineral wool.Plant physiology researchers discovered in the 19th century that plants absorb essential mineral nutrients as inorganic ions in water. Hydroponics | |
| Harley-Davidson Harley-Davidson | |
| Homeopathy Homeopathy is a form of alternative medicine that treats patients with heavily diluted preparations that are thought to cause effects similar to the symptoms presented, first expounded by German physician Samuel Hahnemann in 1796. Homeopathic remedies are prepared by serial dilution with shaking by forceful striking ("succussing") after each step under the assumption that this increases the effect of the treatment; this process is referred to as "potentization". Homeopathy | |
| Ithaca, New York The City of Ithaca (named for the Greek island of Ithaca) sits on the southern shore of Cayuga Lake, in Central New York State, USA. It is best known for being home to Cornell University — an Ivy League school with almost 20,000 students (most of them studying on Cornell’s Ithaca campus). Ithaca College is also located just south of the city in the Town of Ithaca. The college is strongly linked to the city, further adding to Ithaca’s strong “college town” focus and atmosphere. Ithaca,_New_York | |
| Intergovernmental Panel on Climate Change The Intergovernmental Panel on Climate Change (IPCC) is a scientific intergovernmental body tasked to evaluate the risk of climate change caused by human activity. The panel was established in 1988 by the World Meteorological Organization (WMO) and the United Nations Environment Programme (UNEP), two organizations of the United Nations. The IPCC shared the 2007 Nobel Peace Prize with former Vice President of the United States Al Gore. Intergovernmental_Panel_on_Climate_Change | |
| Food irradiation Food irradiation is the process of exposing food to ionizing radiation to destroy microorganisms, bacteria, viruses, or insects that might be present in the food. Further applications include sprout inhibition, delay of ripening, increase of juice yield, and improvement of re-hydration. Food_irradiation | |
| Jaguar The jaguar, Panthera onca, is a big cat, a feline in the Panthera genus. It is the only Panthera species found in the Americas. The jaguar is the third-largest feline after the tiger and the lion, and the largest and most powerful feline in the Western Hemisphere. Jaguar | |
| Kyoto Protocol Kyoto Protocol is a protocol to the United Nations Framework Convention on Climate Change (UNFCCC or FCCC), an international environmental treaty produced at the United Nations Conference on treaty is intended to achieve "stabilization of greenhouse gas concentrations in the atmosphere at a level that would prevent dangerous anthropogenic interference with the climate system." Kyoto_Protocol | |
| Kyoto Protocol Talk:Kyoto_Protocol | |
| Kerosene Kerosene, sometimes spelled kerosine in scientific and industrial usage, also known as paraffin, is a combustible hydrocarbon liquid. The name is derived from Greek keros (κηρός wax). The word Kerosene was registered as a trademark by Abraham Gesner in 1854 and for several years only the North American Gas Light Company and the Downer Company (to which Gesner had granted the right) were allowed to call their lamp oil kerosene. It eventually became genericized. Kerosene |
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