I think the environmental movement has failed in that it's used the stick too much; it's used the apocalyptic tone too much; it hasn't sold the positive aspects of being environmentally concerned and trying to pull us out.

I can go into the wilderness and not see anyone for days and experience a kind of space that hasn't changed for tens of thousands of years. Having that experience was necessary to my perception of how photography can look at the changes humanity has brought about in the landscape. My work does become a kind of lament.

I wish my artwork could persuade millions of people to join a global conversation about sustainability.

I wish we could launch a ground-breaking competition that motivates kids to invent new ideas in sustainable living.

Somebody referred to what I do as subliminal activism, which I like.

Like all animals, human beings have always taken what they want from nature. But we are the rogue species. We are unique in our ability to use resources on a scale and at a speed that our fellow species can't.

Digital photography and Photoshop have made it very easy for people to take pictures. It's a medium that allows a lot of mediocre stuff to get through.