In 1998, aircraft designer Paul MacCready shares his vision of an earth out of balance, and talks about the steps he’s taking in his own work to help solve it — by building amazing solar airplanes, superefficient gliders and an electric car. It’s a stirring vision of how all of us, no matter what our profession, can help make change.

Via: TED | TEDBlog: Nature vs. humans (and what I’m doing about it): Paul MacCready on TED.com