Not wasting any water bottles is good. Not leaving the lights on is good. Turning the thermostat down in the winter, up in the summer, is good. But the best thing any of us in the developed world, especially in the United States, can be doing is talking about it.

There really is no such thing as race.

But investment in space stimulates society, it stimulates it economically, it stimulates it intellectually, and it gives us all passion.

The more you find out about the world, the more opportunities there are to laugh at it.

Climate change is a real deal. So, hey deniers - cut it out, and let's get to work.

The world's going to change climatically. We just want to control the change. We want to have a high quality of life for billions of people as we pass through this era.

The natural world is a package deal; you don't get to select which facts you like and which you don't.