Green as we go

Traveling around the world obviously involves a wee bit of waste in the way of fuel. There's no way to really limit that since neither of us is up for the swim. But we do hope to be as environmentally conscious as we can on this trip. Some of our ideas:

-Refill our water bottles whenever possible.

-Buy locally.

-Take public transportation and/or walk whenever possible.

-Pack light and don't buy stuff we don't really need.

-Learn more about organic farming from our work in Italy and Costa Rica.

-Do the 'ol leave only footprints and take only pictures.

-See what others are doing in their communities to preserve and protect our environment. Then tell y'all about it.

Any other ideas?