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Palin has allowed big game hunters to shoot Alaska's bears and wolves from low-flying planes

Seen from the air, Sarah Palin's state is an environmental wonderland.

The guardian of this wilderness – and Governor of Alaska – has, this week, become one of the most recognisable faces in the world. But behind her beaming smile and wholesome family values is a woman aligned with the big oil and coal firms that are racing to exploit Alaska's vast energy reserves.

But the woman who could soon be a 72-year-old's heartbeat away from the United States presidency has an environmental policy so toxic it would make the incumbent, George Bush, blush.

Mr McCain has stressed he is concerned about global warming and has come out against drilling in the Arctic reserve. But, in recent weeks, he has wobbled on the issue. And environmentalists are describing Mrs Palin, who denies climate change is man-made, as "either grossly misinformed or intentionally misleading".

The Palin administration has allowed Chevron to triple the amount of toxic waste it pours into the waters of Cook Inlet.