Contamination of the air by noxious gases and minute particles of solid and liquid matter (particulates) in concentrations that endanger health....

Contamination of water resources by harmful wastes; see also sewerage, water supply, pollution, and environmentalism. Industrial...

Human-created noise harmful to health or welfare. Transportation vehicles are the worst offenders, with aircraft, railroad stock, trucks, buses...

The radioactive and toxic by-products of the nuclear energy and nuclear weapons industries. Nuclear waste may have an active life of...

Oil discharged from an ocean-going tanker, pipeline, or oil installation, often as a result of damage. An oil spill kills shore life...

Increase in average global temperature, amounting to approximately 0.74°C/1.3°F from 1906 to 2005. Much of this is thought to be...

Destruction of forest for timber, fuel, charcoal burning, and clearing for agriculture and extractive industries, such as mining...

Contamination of the environment as a result of human activities. The term pollution refers primarily to the fouling of air, water, and land...

Act of seeking, following, and killing wild animals for consumption or display. It differs from fishing in that it involves only land animals....

Wearing away and redistribution of the Earth's soil layer. It is caused by the action of water, wind, and ice, and also by improper...

Acidic precipitation thought to be caused mainly by the release into the atmosphere of sulphur dioxide (SO2) and oxides of nitrogen...

Town in northern Ukraine, 100 km/62 mi north of Kiev; site of a former nuclear power station. The town is now abandoned. On 26 April...

Section of Niagara Falls, N.Y., that formerly contained a canal that was used as chemical disposal site. In the 1940s and 50s the empty canal...

Former principality, Madhya Pradesh state, central India. A region of rolling downs and thickly forested hills, it is predominantly...