clive hamilton, an eminent eco-philosopher in australia wrote a book, "requiem for a species." and we're the species it's a requiem for. i've read everything, the entire book, and there's nothing i disagree with there. james lovelock, the man who invented this idea of gaia, says 90% of humanity will be gone by the end of the century. and sir martin rees, the royal astronomer in britain was asked what are the chances humans will be around by 2100, and he said 50/50. so there are a lot of my colleagues are saying we've passed too many tipping points to go back. my answer is thank you for the message of urgency. we don't know enough to say it's too late. and this isn't some kind of pollyannaish idea. i base that notion of our ignorance on reality. in -- the most prized species of salmon in the world is the sockeye salmon. it's got that bright red fatty flesh that we all love. and the largest sockeye salmon run in the world is in canada in the fraser river. we like a run of about 20 to 35 million salmon is a good run, that's a lot of fish. and in 19, -- sorry, in the year 2009, jus