May I address that?
I would like to point out that politically one of the most outspoken and visionary leaders in the world on the issue of climate change was Margaret Thatcher, when she was Conservative Prime Minister in Britain. She's the one who set up the Hadley Centre in Britain, the leading climate research group. She's the one who argued internationally that there was an urgent need, and this was back in the 1980s. She's fundamentally a chemist by training.
We've known about the greenhouse effect for 200 years. We've known about the specific role of carbon dioxide for over 100 years. In fact, Arrhenius and his colleagues and others have been making the calculations about a warming world for over a century. It's not new science; it's been around for a long time. International leaders have been speaking out on this for a long time. It's true there's more action being taken recently, at least in some countries, because of the latest report, but the scientific community has been pretty strong on this and has been saying the same thing for a very long time.