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Pollution. Pollution has become a major issue over the years. It has ... it.
If not all, a lot of pollution is caused by humans. There ...
pollution. air pollution is a problem with problems. there are problems. ... air
pollution is a problem with problems. there are problems. ...
Water Pollution. ... Water pollution can also make water unsuited for the desired
use. The main cause of water pollution is made by humans. ...
pollution. The environmental issue has certainly ... One of the major forms of pollution
is air pollution. Air pollution is aggravated because ...
Pollution Trading Credits and Corporate Pollution. Pollution trading credits are
widely used throughout the world by industrialized, developed nations. ...
Submitted by rralex89 on September 4, 2006
Category: Science
Words: 1339 | Pages: 6
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Pollution
Methane levels hold steady
Levels of the greenhouse gas methane have plateaued for the first time in about 200 years, shows a report in Geophysical Research Letters. Methane is second only to carbon dioxide in contributing to our planet's warming. The gas - belched out by fossil-fuel burning, rice paddies, festering farm manure and landfill sites - has been accumulating since the industrial revolution. Now the tide may be turning, say Ed Dlugokencky of the National Oceanic and Atmospheric Administration (NOAA) in Boulder, Colorado, and his team. They found that levels steadied between 1999 and 2002, according to measurements from 43 ground-based stations around the world.
The reason for the change is unclear. Dlugokencky believes that a big contributing factor was the break-up of the Soviet Union in 1991. Oil and gas production fell, and the industry became more efficient at plugging gas leaks from pipes and wells.
Experts say the plateau is no cause for complacency. Increasing fossil-fuel consumption in developing nations, or renewed drilling for natural gas, might boost methane again. "The trajectory is still moving up," says David Blake, an atmospheric chemist at the University of California, Irvine.
The finding highlights how small steps to cut methane emissions could slow global warming, he says. Leaking gas pipelines could be capped and incentives introduced to encourage landfill owners and farmers to use methane to run power generators.
Earlier studies hinted at a slowing in the long-term rise in methane - but Dlugokencky's conclusion is based on particularly frequent and accurate measurements..
Taiwan, the largest manufacturer of compact discs in the world, will begin to recycle this product as early as next July, when required regulations have been established, Environmental Protection Administrator Chang Juu-en said yesterday.
Officials from the Environmental...
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