Fred Krupp is searching for a large-scale solution to fight the global climate crisis. The longtime president of the Environmental Defense Fund traveled the U.S. to meet the scientists, business people and dreamers inventing new and better ways to use energy. In his new book, Earth: The Sequel, Krupp and journalist Miriam Horn write about the new technologies these innovators are creating to fight global warming. He hopes that Earth may be one place where the sequel is better than the original.

Krupp delivers a message that makes readers feel hopeful about the future. He writes about a California surfer named Jack Newman. Newman helped start a company that is working on ways to produce better, cleaner and more efficient biofuels. It's very cool stuff, and potentially very profitable. But for Newman, it goes beyond the money. "If we're successful, we'll be wealthy, which means we'll be in a position to impact politics," he says. "Part of my agenda has been to create a power base to change the world."

Krupp sees an exciting race to create technology that is energy efficient. "This is a positive future," says Krupp. "This is a race that will create new billionaires. It's a huge opportunity for America."