Alex Steffen is one of my heroes. His work on Worldchanging (the book and the website) is some of the most important work being done today, so I was stoked to find this hour-long video of a talk he gave at Yale this past spring. In it, he shares many of the ideas—already in play—that can create the bright green future we want to live in.

Right now, he says, there are 2 choices for the billions of mostly young people in the developing world: they can either stay poor and frugal, which no one wants to do, or they can become rich and wasteful like us, which would be an environmental catastrophe. What we need is a third choice—a new kind of prosperity that raises standards of living without trashing the planet. And those of us in the developed world have the resources to create this third choice, which makes it our responsibility.

In this talk, we learn how we are getting there, piece by piece. Dense and vital cities, smart power grid technology, economic and political power for women, thoughtful consumerism, and transparency in industry and government are all on the rise. And they interact in subtle, powerful ways to create new waves of innovation and freedom.

The G20 is meeting today in Pittsburgh, and I can’t help but wish they’d watch and discuss this talk. But part of building a bright green future is each of us taking on responsibility, here and now, to educate ourselves and bring these fresh ideas into our own circles of influence and care. I hope you will take the time this weekend to learn about what’s possible and, indeed, what is already happening, so that you can be part of it.