We sometimes emphasize the danger in a crisis without focusing on the opportunities that are there.

I affirm my faith when I'm asked about it. But I always try to do so in a way that communicates absolute respect, not only for people who worship in a different way, but just as much respect for those who do not believe in God and who are atheists.

It seems an easy choice - sacrifice the tree for a human life - until one learns that three trees must be destroyed for each patient treated. Suddenly we must confront some tough questions. How important are the medical needs of future generations?

We ought to approach this challenge [of global warming] with a sense of profound joy and gratitude: that we are the generation about which, a thousand years from now, philharmonic orchestras and poets and singers will celebrate by saying, they were the ones that found it within themselves to solve this crisis and lay the basis for a bright and optimistic human future.

We face the gravest threat that civilization has ever confronted. It's global in nature and requires a global solution. Increased CO2 emissions anywhere, whether from China or the United States or from one of the countries that is burning its forests like Brazil or Indonesia.

You have to rip your opponent's lungs out and then move on.

Having worked on climate crisis for almost 40 years now, I've seen good days and bad days. And through all of that time, the general trajectory has been it's getting worse, it's getting worse. But in the last ten to 20 years, there's a second development; the solutions are more and more, and more available. So having this broad overview that I've developed over a long period of time, I now see the evidence that the solutions are available. We're gonna do this.