I think today we recognize that economic activity needs to search for ways to protect the environment.

I think the greatest challenge in environmentalism and the most rewarding challenge is trying to figure out how humans can meet their needs while protecting the environment.

We do have serious energy needs for the country, we are aware that natural gas is especially in demand because of its air quality benefits: 90 percent of new power plants have been natural gas-powered.

Human beings are going to be relying on natural resources for a long time.

Predators make it much more difficult to find consensus. It's a lot easier to agree about birds and plants than about animals that endanger people and livestock.

I spend a year at the Hoover Institute at Stanford, researching market approaches to air pollution control.

I believe strongly that we need to get beyond rhetoric, beyond industry and environmentalists fighting with each other, and seriously solve problems.