These are estimates that are done by the experts as to how much they expect we could get from the first lease sale that would take place in ANWR, and the estimate is about $2.5 billion.

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.

The developers, if they decide to move a tortoise, have to pay the long-term costs for enhancing the areas that take care of the tortoise, and it gives us the opportunity to manage an area that is going to be protected.

[In response to a question, he said it was impossible to give] any reliable estimate ... All those estimates are just speculation.

I think that our cooperative conservation approaches get people to sit down and grapple with problem solving.

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.