Ultimately we need to recognize that while humans continue to build urban landscapes, we share these spaces with others species.

If America wants to retain its position as a global power, its president must listen to the people and show strong leadership at this turning point in human history.

We have much to learn by studying nature and taking the time to tease out its secrets.

The voluntary approach to corporate social responsibility has failed in many cases.

We are playing Russian roulette with features of the planet’s atmosphere that will profoundly impact generations to come. How long are we willing to gamble?

Environmentalism isn't a discipline or specialty. It's a way of seeing our place in the world. And we need everybody to see the world that way. Don't think 'In order to make a difference I have to become an environmentalist.'

We're in a giant car heading towards a brick wall and everyone's arguing over where they're going to sit.