Close window Published online: 9 February 2006; | doi:10.1038/news060206-9 Methane burps disproved?Gassy emissions no longer in suspect dock for melting the last ice age.Quirin Schiermeier Strange ice: no evidence that melting methane triggered global warming after the last ice age.© Punchstock Methane escaping from the sea floor to the atmosphere has been a popular suspect for causing rapid climate changes during and at the end of the last ice age. But new data derived from a Greenland ice core have delivered a killer blow to the idea. Methane (CH4) is a much stronger greenhouse gas than carbon dioxide. It...