It's time to come together. We all have the power to change, so what are we waiting for?

I learned to be a hot-air balloon pilot to take tourists over the Masai Mara Reserve in order to earn some money and finance the work I was doing with my wife, Anne. We were studying the life of a family of lions for more than two years. Taking pictures was a way to capture information we could not put in words.

It's time to come together. We all have the power to change, so what are we waiting for?

Will we be able to imagine a new culture of water?

After Hurricane Katrina, over New Orleans, my helicopter crashed and the pilot and I were only saved because we fell on the roof of a flooded house that absorbed the shock. When the helicopter was spiraling downward out of control, I didn't expect to survive at all.

No one is an environmentalist by birth. It is only your path, your life, your travels that awaken you.

The Rio Earth Summit in 1992 changed my life completely, turning me into an activist. From the air, you see things you can't see from the ground - you really understand the impact of man, even in a place you know well. My work is meant to convince people we can no longer live like this.