I can't imagine anything more important than air, water, soil, energy and biodiversity. These are the things that keep us alive.

If we pollute the air, water and soil that keep us alive and well, and destroy the biodiversity that allows natural systems to function, no amount of money will save us.

More than a billion people lack adequate access to clean water.

Think about a seed. Once it lands, it's stuck. It can't move to find better soil, moisture or sunlight. It's able to create every part of itself to grow and reproduce with the help of air, water and sun.

I certainly don't delude myself that there aren't certainly more important things to do in life than make people laugh, but I can't imagine anything that would bring me more joy.

There are more humans than all of the rabbits on earth. There are more of us than all the wildebeests, than all the rats, than all the mice. We are the most numerous mammal on the planet. But because we're not like rabbits or rats or mice, we have technology, we have a consumptive appetite, we have a global economy.