Trib special correspondent MaryJane Butters offers some Simple steps for cutting your carbon footprint - Salt Lake Tribune. I might note that not using plastic bags isn't just about your carbon foot print as it is about the giant raft of plastic the size of Texas floating in the Pacific. And don't kid yourself that such plastic from Utah can't make it to the world's oceans. I've seen those bags in the wilderness drifting along their not-so-merry way.
I am also going to be transitioning SN to its next theme--something to do with the environment. As I recall, I think I've done "Sustainability" before. It takes me a while to settle on such over-arching themes.