David Suzuki

“Public concern in the late 1980s was right at the top and we had the first international conference on the atmosphere in 1988, where there were over 40 governments, environmentalists, scientists, private sector people. At the end, they said global warming represented a threat to humanity, second only to global nuclear war. If the world had followed the conclusions from that conference, we would not have the problem we face today and we would have saved trillions of dollars and millions of lives. Now, it is too late. I’ve never said this before to the media, but it’s too late. I say that because I go by science and Johan Rockström, the Swedish scientist who heads the Potsdam Institute, has defined nine planetary boundaries. …As long as humans, like any other animal, live within those nine constraints, we can do it forever, and that includes the amount of carbon in the atmosphere.”