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.
active solar energy systems
Solar energy system that collects energy through the use of mechanical devices like photovoltaic cells or falt plate collectors.
Concentration of trace substances, such as carbon monoxide, sulfur dioxide, nitrogen oxides, hydrocarbons, and solid particules, at a greater level that occurs in average air.
Power supplied by people or animals.
biochemical oxygen demand
Amount of oxygen required by aquatic bacteria to decompose a given load of organic waste;a measure of water pollution
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 propelant in aerosols a refrigerant and inplastic foams and fire extinguishers
Degradation of land, especially in semiarid areas, primarily because of human actions like excessive crop planting, animal grazing, and tree cutting.
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.
Rapid diffusion of new agricultural technology, especially new high-yield seeds and fertilizers.
Anticipated increase in Earth's temperature, caused by carbon dioxide trapping some of the radiation emitted by the surface.
Power generated by moving water.
Power supplied by machines
A source of energy that is a finite supply capable of being exhausted.
A gas that absorbs ultraviolet radiation, found in the stratosphere, a zone between 15 and 50 km above Earth's surface.
passive solar energy systems
Solar energy that collects energy without the use of mechanical devices.
An atmospheric condition formed through a combination of weather conditions and pollution especially from motor vehicles emissions
Solar energy cells, usually made from silicon that collect solar rays.
Addition of more waste than a resource can accommodate.
The amount of energy in deposits not yet identified but thought to exist.
The amount of a resource remaining in discovered deposits.
Particles from a nuclear reaction that emits radaition
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 emission of gasses and odors from the decaying trash, to minimize fires and to dicourage vermin.
Farming methods that preserve long-term productivity of land and minimize pollution, typically by rotating soil- restoring crops with cash crops and reducing in-puts of fertilizer and pesticides.
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.