James Hansen:
Politicians would be happy if scientists just tell them there is a climate problem and then go away and shut up. Let them decide what they want to do.
But I decided that I did not want my grandchildren, some day in the future, to look back and say, “Opa understood what was happening, but he did not make it clear.”
What is clear is that we cannot burn all the fossil fuels. There is a limit on how much carbon we can put into the atmosphere.