The world’s wetlands are big sources of greenhouse gases
PEATY wetlands emit about 1.3 billion tonnes of CO2 a year as a result of human activity that drains them and thus exposes them to the oxidative effect of the atmosphere. This figure does not include the effect of fire on dried-up bogs, which can double the amount. That, at least, is the conclusion of a report published by Wetlands International, a lobby group, this week. Drained peat occupies 0.3% of the world’s land surface, but is responsible for 6% of man-made CO2 emissions. Indonesia is the biggest emitter, but richer countries are guilty too.
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