I tell my graduate students [at Bard College], ‘There are two ways to change the world: through policy, or through sustainable business.’ With sustainable business, individuals build solutions within the current system… Sustainable business asks, ‘How would nature do this?’

One hundred years ago, visionary political leaders from the Progressive Era established a system of national forests and parks in our country that are the envy of the world and today are the treasure of an entire nation. Why not a similar, global vision for our generation?

The Arctic is the planet's air conditioner and it's starting to break down.

It is time to start going door to door and convincing our neighbours to vote for a clean-energy future.

The fate of hundreds of thousands of species on this planet may be decided in the next decade. To slow the rush to extinction, we need to achieve real, substantive political power, and we need to get there fast.

Electing clean-energy leaders into the Senate, the House, and the Oval Office - and getting it done in the next few years - is the only real solution to climate stabilization at acceptable levels.

In the year 2007, seals, otters, lions, turtles, frogs, apes, snakes, butterflies, polar bears, cheetahs, whales are disappearing along with their variously furnished homes: cloud forests, rain forests, ice pack, boreal forests, coral reefs, forests of deciduous trees, conifer and palm.