While we need to provide leadership and stability to the world, we should do that through diplomacy.

It's incumbent on all of us to remember our history and not repeat our past sins.

We're planting trees to break up the concrete jungle. We're building public transportation and affordable housing.

Recycling more plastics can help local businesses and expand jobs while supporting the goals of sustainability.

My entry into the environmental arena was through the issue that so dramatically - and destructively - demonstrates the link between science and social action: nuclear weapons.

I take a biocentric point of view. I look at things from the point of view of the Earth and the laws of ecology. As opposed to the anthropocentric point of view, where everything revolves around humanity.

The sky always seems to be out there, away from us. I like to bring it down in close contact with us, so you feel you are in it. We feel we are at the bottom of this ocean of air; we are actually on a planet.

We need to send a message to Congress and the president that we want them to take the actions that are needed to preserve climate for young people and future generations and all life on the planet.