It's extremely hard to know what the economic consequences of any decision will be. And I'm not a, a, a financial analyst, so I, I generally don't try to make some kind of prediction about that.

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

Scientific monitoring is going to be terrifically important, because whatever steps we take ... we will have to monitor those steps in order to know if they're actually working.

We don't survive without plants and animals because we rely on them, we rely on plants to put oxygen into the atmosphere, we rely on ... fish and crops and cows to eat.

I think Pope Francis is our Pope Francis. I mean, the point of him is that he's a global leader, and he's trying, I think he's embracing that role.

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

Many people have the impression that there is significant scientific disagreement about global climate change. It's time to lay that misapprehension to rest. There is a scientific consensus on the fact that Earth's climate is heating up and human activities are part of the reason. We need to stop repeating nonsense about the uncertainty of global warming and start talking seriously about the right approach to address it.