Richard Branson has pledged $3bn to fight climate change, and delivered just $230m. Naomi Klein looks at the 'greenwashing' of big business and its effects – on the planet, and our own bodies...In our desire to deal with climate change without questioning the logic of growth, we've been eager to look both to technology and the market for saviours. And the world's celebrity billionaires have been happy to play their part....[refers to Virgin, BP, Exxonmobile]