A major new study on climate change is warning that global warming might be twice as catastrophic as previously thought. This is according to a new study published today in the journal Nature. The study found the Earth’s climate is far more sensitive to increases in man-made greenhouse gases than previously realized. Meanwhile at the World Economic Forum in Davos, British Prime Minister Tony Blair called on the US to tackle global warming. And the Guardian of London reports that lobby groups funded by the US oil industry are targeting Britain in a bid to play down the threat of climate change and derail government action to cut greenhouse gas emissions.