There are two numbers you need to know about climate change. The first is 51 billion. The other is zero. Fifty-one billion is how many tons of greenhouse gases the world typically adds to the atmosphere every year.

I have to admit that, until recently, I was somewhat wary of the global warming debate. I believe it is now our responsibility to take the lead on this issue.

In other words, by mid-century, climate change could be just as deadly as COVID-19, and by 2100 it could be five times as deadly.

Climate change is a terrible problem, and it absolutely needs to be solved. It deserves to be a huge priority.

By the time we see that climate change is really bad, your ability to fix it is extremely limited... The carbon gets up there, but the heating effect is delayed. And then the effect of that heat on the species and ecosystem is delayed. That means that even when you turn virtuous, things are actually going to get worse for quite a while.

We need to grow food, and we need to grow fuel. Imagine if, instead of dust rising into the sky, the carbon started returning to the Earth.