It seems to me that the natural world is the greatest source of excitement; the greatest source of visual beauty; the greatest source of intellectual interest. It is the greatest source of so much in life that makes life worth living.
I just wish the world was twice as big and half of it was still unexplored.
The truth is: the natural world is changing. And we are totally dependent on that world. It provides our food, water and air. It is the most precious thing we have and we need to defend it.
No one will protect what they don’t care about, and no one will care about what they have never experienced.
Instead of controlling the environment for the benefit of the population, perhaps we should control the population to ensure the survival of our environment.
Anyone who believes in indefinite growth on a physically finite planet is either mad or an economist.
The question is, are we happy to suppose that our grandchildren may never be able to see an elephant except in a picture book?
The world is full of wonders, but they become more wonderful, not less wonderful, when science looks at them.
What humans do over the next 50 years will determine the fate of all life on the planet.
Life is not all high emotion. Some of the most interesting things are when its not highly emotional: little details of relationships and body language.
I’m no longer sceptical. I no longer have any doubt at all. I think climate change is the major challenge facing the world.
Bringing nature into the classroom can kindle a fascination and passion for the diversity of life on earth and can motivate a sense of responsibility to safeguard it.
The correct scientific response to something that is not understood must always be to look harder for the explanation, not give up and assume a supernatural cause.
The human population can no longer be allowed to grow in the same old uncontrollable way. If we do not take charge of our population size, then nature will do it for us and it is the poor people of the world who will suffer most.
I mean, it is an extraordinary thing that a large proportion of your country and my country, of the citizens, never see a wild creature from dawn ’til dusk, unless it’s a pigeon, which isn’t really wild, which might come and settle near them.