The 'New Yorker' asked me to shoot a story on climate change in 2005, and I wound up going to Iceland to shoot a glacier. The real story wasn't the beautiful white top. It ended up being at the terminus of the glacier where it's dying.

Early in my career I discovered that there was something really special about photographing at night that places your mind on the surface of the planet. You’re no longer just a human being walking around in the regular world. You’re a human animal striding around on the surface of the planet that’s out in the middle of the galaxy. We as a culture, we’re forgetting that we are actually natural organisms and that we have this very deep connection and contact with nature. You can’t divorce civilization from nature. We totally depend on it.

I have often thought that my work with wildlife taught me the meaning of patience, and my work with the big trees taught me the meaning of humility, and my work with the ice has taught me the meaning of mortality.

I personally spend the majority of my time by far on outreach and education and fundraising and administration.

There is a glacier in Iceland, Solheimar, which has retreated a great deal, and every time I go back there and see what's not there any more, it does something to the heart. It makes you realise it's possible for a gigantic natural element to just disappear.

I've been to the Himalayas a half a dozen times and I love it. I'm just kind of tired of going literally twelve time zones around the world. I would rather go six time zones and get to Iceland or whatever it is.

You can't divorce civilization from nature - we totally depend on it.