Geography is the subject which holds the key to our future

My marriage has worked because I am not around much.

I wanted to be an explorer, but gradually found the world had been explored and that there was nowhere left, really. Once they climbed Everest in 1953, when I was 10 years old, I thought, 'Well, that's pretty much it now.' But the idea of travelling and exploring and adventure was very strong.

There is barely a country in the world where you will be completely safe.

From my travels around the world I have seen how much damage and pollution is done by the careless disposal of waste. It is also evident that we in the West produce far more and throw away far more than the developing world, almost without thinking

The human race should just slow down and think about what it is doing.

I can be me, and people seem quite happy with that.