The term pollution usually refers to human activities that adversely affect the world around us. More often than not, it comes attached to other general terms related to the ecosystem, such as air pollution or ocean pollution, or to a human sense, such as noise pollution or light pollution.
Scientists studying different types of pollution tend to focus on more specific environmental problems.
|Air Pollution Issues
Acid Rain in Europe
Air Pollution in the Grand Canyon
Air Pollution in Mexico
Environmental Externalities and Air Pollution
What is Smog?
The typical perspective of air pollution sees is as emblematic of the top picture, smoke billowing from the top of an industrial smokestack.
On the other and, consider another type of air pollution, ozone depletion. This type of air pollution, refers to the release of Chlorofluorocarbons (CFCs) into the atmosphere that breaks down the ozone layer in the stratosphere, allowing an increase in harmful ultraviolet radiation (UV-B radiation) to reach the ground.Legislative History Before the Clean Air Act
Two separate but interrelated questions frame many of today's formal water pollution conversations.
Water pollution sources divide between point source and non-point sources.
Point source water pollution refers to specific, identifiable sources, such as sewage treatment plants or industrial plants, that directly discharge material into the water.
For example, hazardous waste discharge in local streams would be recorded. Information about local citizens groups working on watershed issues is also listed if applicable.
Non-point water pollution can not be traced to one definitive source.
|Ten Largest Lakes
Lake Superior (31,700 sq. miles)
Lake Huron (23,000 sq. miles)
Lake Michigan (22,300 sq miles)
Lake Erie (9,910 sq miles)
Lake Ontario (7,340 sq. miles)
Great Salt Lake (2,117 sq. Miles)
Lake of the Woods (1,485 sq. miles)
Iliamna Lake (1,014 sq. miles)
Lake Oahe (685 sq miles)
Lake Okeechobee (662 sq. miles)
© 2011-2014 Patricia A. Michaels