Monday, July 21, 2008

Wetland destruction = GHG emissions

Destroying wetlands leads to release of green house gases.
Some 60% of wetlands worldwide -- and up to 90% in Europe -- have been destroyed in the past 100 years, principally due to drainage for agriculture but also through pollution, dams, canals, groundwater pumping, urban development and peat extraction.
These waterlogged (either seasonally or year-round) areas contain an estimated 771 gigatonnes (771 billion tonnes) of greenhouse gases -- both CO2 and more potent methane -- an amount in CO2 equivalent comparable to the carbon content of today's atmosphere.

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