Telegraph: As the world stares down the barrel of a global financial crisis, it would be easy to think that climate change has been wiped from the political agenda. But to the surprise of many over here, in the USA, ending dependency on hydrocarbons still looms large in both the Obama and McCain presidential campaigns. In fact last Thursday, before joining President Bush and Barack Obama at the White House, John McCain still found time to visit the Clinton Global Initiative in New York to …