In some cases, I allow the edge of the set, the edge of my own artificial, artistic imposition, to show up because I don't want to hide from that. I want to acknowledge that there is a living human and a living eye and a living mind and a living heart responding to what's going on out there.

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.

When I worked with wildlife a lot in the Eighties and Nineties, I learnt the meaning of patience. And when I worked with trees, I learned the meaning of humility.

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

Ultimately, we have to ask ourselves an essential spiritual and ethical question: Are we the kind of people who take everything for ourselves and leave nothing for others, or do the angels of our better nature still live? I believe the angels are still alive.

Glacial pace is actually an incorrect concept. The glaciers move a lot faster and they react a lot faster than people imagine.

Each of us can and must shift our behavior according to our ability. For some, that means changing diet, shopping locally, or putting solar panels on their house. For others, it means using their voice to inspire transformative change.