Rupert Murdoch is the most dangerous man in the world.

It's going to cost trillions of dollars to rework the energy sources all over the world. Were going to have to move away from fossil fuels.

When I started CNN, I made the decision to stay out of endorsing candidates, and let the doers make up their own minds about politics, that it wasn't going to come from me.

Struggling hard to achieve something is the most fun I get.

If you can get yourself where you're not afraid of dying, then you can move forward a lot faster.

Even if we didn't have greenhouse gases, were going to have to move away from fossil fuels, as we're going to run out. They're finite, whereas solar and wind are infinite.

If you never quit, you're never beaten.