If you're going to drive a Hummer and buy carbon offsets, that's like getting drunk every night and getting into an AA meeting, throwing money in the basket, and leaving.

I ride my bike for transportation a great deal - occasionally I ride it for fun. But I also have a generator bike that's hooked up to my solar battery pack, so if I ride 15 minutes hard on my bike, that's enough energy to toast toast, or power my computer.

To be a modern person in 2012, you are often required to have some electronics in your life. And I do. I try to put that phone down, put the computer away, and get out there and hike in the woods; feel it in my feet, feel it in my hands; get out in the garden and feel the soil under my fingers, my fingertips and my fingernails. I try to be involved in nature in a very tactile way. I think that's important.

One of the regular intervals of meditation in my life, believe it or not, is in my car.

The film 'Tapped' illustrates quite clearly how we've been getting 'soaked' for years by the bottled water industry.

I bought my first electric car in 1970. Its top speed was 15 mph and it had just a 15 mile range - it was essentially a golf cart with a windshield wiper and a horn.

I started composting in 1970 by taking my food scraps out behind where I lived and burying them in a hole next to the railroad tracks - and green things started to grow there!