The good oil on desertification on this planet now, and the proposed mimic-nature=grazing solution.
http://www.ted.com/talks/allan_savory_how_to_green_the_world_s_deserts_and_reverse_climate_change?utm_source=newsletter_weekly_2013-03-09&utm_campaign=newsletter_weekly&utm_medium=email&utm_content=bottom_right_image#t-16027