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

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 also know that China and India, as their economies ramp up, are using more and more energy.

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

Dense overgrown forests and rangelands have grown like a cancer. They need to be treated.

What's near and dear to my heart is cooperative conservation.

Growing up in Denver, I'm sure it started with loving the Colorado mountains.