Plastic bags are bad and for the most part unnecessary.

The terrible part of this looming catastrophe is that people have been working on solutions for years and have developed concrete steps to massively reduce our energy use, while stimulating whole new industries and technologies that are more efficient and affordable.

It's not unexpected that shooting massive amounts of water, sand, and chemicals at high pressure into the earth to shatter shale and release natural gas might shake things up. But earthquakes aren't the worst problem with fracking.

I see a world in the future in which we understand that all life is related to us and we treat that life with great humility and respect.

Our beliefs, our values shape the way we look out at the world and the way we treat it. If we believe that we were here, placed here by God, that this - all of this creation is for us, it's for us to go and occupy, dominate and exploit, then we will proceed to do that.

Humanity is facing a challenge unlike any we've ever had to confront. We are in an unprecedented period of change.

More than any other time in history, the 1990s will be a turning point for human civilization.