ScienceDaily: The sensitivity of Earth's climate to CO2 could be double what has been previously estimated, according to a statement issued by the Geological Society of London. In an addendum to 2010's 'Climate change: Evidence from the Geological Record', the statement notes that many climate models typically look at short term, rapid factors when calculating Earth's climate sensitivity -- defined as the mean global temperature increase brought about by a doubling of atmospheric CO2. It is well known that a...