http://news.bbc.co.uk/1/hi/sci/tech/4660938.stm
"The thing that is perhaps not so familiar to members of the public... is this notion that we could come to a tipping point where change could be irreversible," she told BBC Radio 4's Today programme.
"We're not talking about it happening over five minutes, of course, maybe over a thousand years, but it's the irreversibility that I think brings it home to people."
What do all those stupid scientists know, eh Tranny?