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I'm a big fan of 'National Geographic', the magazine and the channel. Anything to do with the natural world. For years, when I was younger, I was convinced I would be a nature photographer, but that didn't pan out.

Helping people understand the impact of key environmental and human issues worldwide is something that I'm passionate about. CNN's 'Going Green' series of specials are engaging viewers around the world through important messages of conservation and hope.

I wish that all of nature's magnificence, the emotion of the land, the living energy of place could be photographed.

I see my filming career as an opportunity to get the message of conservation out to an even greater audience.

A photographer must be prepared to catch and hold on to those elements which give distinction to the subject or lend it atmosphere.

People are at their best when they can be natural. And that's the hardest thing as a photographer.

What you need to be a good photographer is an overwhelming curiosity and a good digestion. Sometimes you feel blessed with curiosity, sometimes you feel cursed with it.

It is my intention to present - through the medium of photography - intuitive observations of the natural world which may have meaning to the spectators.

It used to be that artists thought of nature as their environment. Now media is our environment. It has been for the past 50, 70 years. It's what you see on TV, on the computer, what is in the magazines and newspapers.

The images of Earth's delicate biosphere, contrasting with the sterile moonscape where the astronauts left their footsteps, have become iconic for environmentalists: these may indeed be the Apollo programme's most enduring legacy.