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http://www.guardian.co.uk/international/story/0,3604,1546797,00.html


Warming hits 'tipping point'

Siberia feels the heat
It's a frozen peat bog the size of France and Germany combined, contains billions of tonnes of greenhouse gas and, for the first time since the ice age, it is melting

Ian Sample, science correspondent
Thursday August 11, 2005

Guardian

A vast expanse of western Sibera is undergoing an unprecedented thaw that could dramatically increase the rate of global warming, climate scientists
warn today.

Researchers who have recently returned from the region found that an area of permafrost spanning a million square kilometres - the size of France and
Germany combined - has started to melt for the first time since it formed 11,000 years ago at the end of the last ice age.

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