DOHA, Qatar (November 27, 2012)--The United Nations is warning in a new report that a thawing in the permafrost that covers almost a quarter of the northern hemisphere could "significantly amplify global warming."
The warning came as climate talks intensified Tuesday in Qatar.
The report says the dangers of carbon dioxide and methane emissions from warming permafrost are becoming an emerging issue among climate scientists.
These dangers have so far not been factored in projections about future temperature rises.
Representatives from more than 200 countries are negotiating a climate deal in Doha that would keep global temperatures from rising more than 3.6 F compared to preindustrial times by 2100.
The World Bank has projected temperatures to increase by up to 7.2 F by then.