The scientist who coined the term "global warming" in the 1970s has proposed a radical solution to the problem of climate change.
Wallace Broecker advocated millions of "carbon scrubbers" - giant artificial trees to pull CO2 from the air.
Dr Broecker told the Hay literary festival in south-east Wales: "We've got an extremely serious problem.
He added: "It's a race against time and we are just sort of crawling along at a slow pace." He said some 20 million of the scrubbing devices would be required to capture all the CO2 currently produced in the US.
But he told the festival: "Okay, you say that's enormous, but we make 55 million cars a year, so if we really wanted to we could. Over 30 or 40 years we could easily make that number." After addressing the festival, Dr Broecker told the BBC News website that 60 million of the devices would be needed worldwide at an estimated cost of $600bn (£303bn) a year.
http://news.bbc.co.uk/1/hi/wales/7429562.stm
If it works, I'm for it, and the Yanks should foot the bill for ignoreing the problem for far too long.