It's easier to discredit the science than to say that climate change is a genuine issue but we don't want to do anything about it.

If we smoke, there's no magic number of cigarettes, or number of years, that we can smoke before we know we'll get lung cancer.

I feel that one of the most important things I can do is connect climate change to the values, the faith, and the issues we already care about. And if, in the process, I have to sidestep around some very explosive mines, I will do that.

Natural gas is a very flexible source of energy that can help us bridge the gap between our current high-carbon economy and our zero-carbon future.

Our carbon emissions have to eventually go to zero. We have to. Otherwise we're never going to have a stable climate and that's what our goal is for human civilization to thrive, a stable climate. We don't want one that's hotter, we don't want one that's colder, we want one that's stable.

Where I live, if I put solar panels on my roof I'm not allowed to sell that energy back to the grid. I can't change that restriction myself. I need our local decision-makers to fix that.

We need a price on carbon that accurately reflects its real costs on our society and our wellbeing.