Amazon now has a "GO GREEN" category that you may wish to check out.
Since we live aboard our boat, So It Goes a CAL-34, we are very interested in being environmentally friendly and also in ways of generating power (solar & wind). We converted our CAL-34 over to an electric motor several years ago before it started to become hip... that's us... trendsetters :) Although, we are a sailboat and that is what we do... SAIL! We only tend to use the motor for things like going through the channel to go into the Lagoon or other tight, unavoidable spots. We usually anchor and up-anchor under sail.
Amazon has other handy things such as reusable shopping bags. I wonder how these will hold up as cat toys? As you can buy 5 bags for under $10, I could afford to give one to Willow & Buffy for a destruction test. Our kittens love playing with paper bags but after a few days they get quite a few holes in them
We heard the other day that IKEA is going to start selling solar panels. That's great!
Enjoy!