Musical Mondays: Earth Day

This week the theme is Earth Day. Post your favorite song that in some way relates to the Earth, conservation, or "being green".

Please add your link to the list below only if you are actually participating in Musical Monday. If you're not sure what's going on here, click on "rules" above or check out some of the links found on previous weeks for examples. Anyone with a blog can play along, so please jump in!