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|Sulfur oxides and nitrogen oxides, emitted by burning fossil fuels, enter the atmosphere-where they com¬bine with oxygen and water to form sulfuric acid and nitric acid-and return to Earth's surface
|Conversion of sulfur oxides and nitrogen oxides to acids that return to Earth as rain, snow, or fog.
|Active solar energy systems
|Solar energy system that collects energy through the use of mechanical devices like photovoltaic cells or flat-plate collectors.
|Concentration of trace substances, such as carbon monoxide, sulfur dioxide, nitrogen oxides, hydrocarbons, and solid particulates, at a greater level than occurs in average aIr.
|Power supplied by people or animals. Power supplied by people or animals.
|Biochemical Oxygen demand (BOD)
|Amount of oxygen required by aquatic bacteria to decompose a given load of organic waste; a measure of water pollution.
|The number of species within a specific habitat. Biomass fuel fuel that derives from plant material and animal waste.
|A nuclear power plant that creates its own fuel from plutonium
|A gas used as a solvent, a propellant in aerosols, a refrigerant, and in plastic foams and fire extinguishers.
|The sustainable use and management of a natural resource, through consuming at a less rapid rate than it can be replaced.
|including iron ore, that are utilized in the production of iron and steel.
|The splitting of an atomic nucleus to release energy.
|Fossil fuel Energy
|source formed from the residue of plants and animals buried millions of years ago
|Creation of energy by joining the nuclei of two hydrogen atoms to form helium.
|Energy from steam or hot water produced from hot or molten underground rocks.
|Anticipated increase in Earth's temperature, caused by carbon dioxide (emitted by burning fossil fuels) trapping some of the radiation emitted by the surface.
|Power generated from moving water. Ideograms The system of writing used in China and other East Asian countries in which each symbol represents an idea or a concept rather than a specific sound, as is the case with letters in English.
|Power supplied by machines.
|metals utilized to make products other than iron and steel.
|A source of energy that is a finite supply capable of being exhausted.
|gas that absorbs ultraviolet solar radiation, found in the stratosphere, a zone between 15 and 50 kilometers (9 to 30 miles) above Earth's surface.
|Passive solar energy systems
|Solar energy system that collects energy without the use of mechanical devices.
|An atmospheric condition formed through a combination of weather conditions and pollution, especially from motor vehicle emissions.
|Solar energy cells, usually made from silicon, that collect solar rays to generate electricity.
|Addition of more waste than a resource can accommodate.
|The amount of energy in deposits not yet identified but thought to exist.
|Maintenance of a resource in its present condition, with as little human impact as possible.
|The amount of a resource remaining in discovered deposits.
|Particles from a nuclear reaction that emit radiation; contact with such particles may be harmful or lethal to people and must therefore be safely stored for thousands of years.
|A resource that has a theoretically unlimited supply and is not depleted when used by humans.
|A substance in the environment that is useful to people, is economically and technologically feasible to access, and is socially acceptable to use
|A place to deposit solid waste, where a layer of earth is bulldozed over garbage each day to reduce emissions of gases and odors from the decaying trash, to minimize fires, and to discourage vermin.
|The level of development that can be maintained in a country without depleting resources to the extent that future generations will be unable to achieve a comparable level of development.