Scientists should continue doing what they've always done, which is to understand the Earth as well as they can.

There's real economic costs to climate change - So, Superstorm Sandy led to billions of dollars in damages. The fires out in the west, 70 million dollars a day are being spent in fighting fires that have clearly been exacerbated by drought and climate change. So, people have pointed out the true dollars and cents cost of inaction on climate change.

I think it is important for people to understand that there are real serious economic costs and real serious economic damages associated with inaction on climate change.

It really is a very radical call ... to reject materialism as our central value and to think about the sanctity of life and what that really means if we take it seriously.

The same mentality that leads to environmental despoliation, environmental destruction, also leads to damage to people.

Most people have thought of ... climate change as a problem about the environment that is separate and distinct from problems of human wellbeing.

At a recent conference, a colleague told one of us that in IPCC discussions, some scientists have been reluctant to make strong claims about the scientific evidence, lest contrarians "attack us". Another said that she'd rather err on the side of conservatism in her estimates, because then she feels more "secure."