Humans control 23% of all photosynthetic activity


A lot of farming and other activities by humans, and on the increase. New estimate shows that humans control 23% of photosynthetic activity.
http://www.sciam.com/article.cfm?chanID=sa003&articleID=88D6F188-E7F2-99DF-33EF7C83A99DCD04&ref=rss