The days of exploration of Shackleton and Scott are long gone. Everything has been climbed, crossed, done. Now what we're exploring are the full boundaries of human endeavour. It's not physical - it's all in the head.

We need to save the Arctic not because of the polar bears, and not because it is the most beautiful place in the world, but because our very survival depends upon it.

If we pass on an unsustainable environment to our children we have failed them.

There is nothing more powerful than the made-up mind.

The swim at Deception Island was by far the hardest swim I've ever done. Antarctica is a very unforgiving environment. If you don't train properly, you'll die.

Climate change is the Everest of all problems, the thorniest challenge facing humankind.

The right to have our environment protected for the benefit of present and future generations is our most important human right.