Sulfur oxides and nitrogen oxides, emitted by burning fossil fuels, enter the atmosphere-where they combine 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.
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.
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
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.
Metals, including iron ore, that are utilized in the production of iron and steel.
The splitting of an atomic nucleus to release energy.
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.
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 available in discovered deposits
Materials from a nuclear reaction that emit radiation; contact with such particles may be lethal to people; therefore, the materials must be safely stored for thousands of years.
the separation, collection, processing, marketing, and reuse of unwanted material
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.