The head of one of the world's biggest oil companies has admitted that the threat of climate change makes him "really very worried for the planet".
In an interview in today's Guardian Life section, Ron Oxburgh, chairman of Shell, says we urgently need to capture emissions of the greenhouse gas carbon dioxide, which scientists think contribute to global warming, and store them underground - a technique called carbon sequestration.
"Sequestration is difficult, but if we don't have sequestration then I see very little hope for the world," said Lord Oxburgh. "No one can be comfortable at the prospect of continuing to pump out the amounts of carbon dioxide that we are pumping out at present ... with consequences that we really can't predict but are probably not good."
His comments will enrage many in the oil industry, which is targeted by climate change campaigners because the use of its products spews out huge quantities of carbon dioxide, most visibly from vehicle exhausts.
His words follow those of the government's chief science adviser, David King, who said in January that climate change posed a bigger threat to the world than terrorism.