How do we even begin to save the world? The answer is simple, really...plant more trees. Why isn't everyone planting more trees? It's so easy to do, inexpensive, and if you plant fruit trees, you can harvest juicy sweet food from them! Check out this video on YouTube.
Since I try to "practice what I preach"...over the three years we've been here, I've planted two peach trees, two apple trees, one plum, two unidentified trees, two fig trees, three oaks, one Mexican plum, one pomegranate, one native Texas persimmon, two apricot trees and many smaller shrubs and understory plants. All on a tiny town lot.
If I can do it, you can, too. :-)