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.
60%.
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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