News Humans Climate meddling dates back 8,000 years Cutting down trees put carbon in the atmosphere long before the industrial revolution Share this:FacebookTwitterPocketRedditPrintEmail By Alexandra Witze March 29, 2011 at 5:07 pm This article is only available to Science News subscribers. Subscribers, enter your e-mail address to access our archives. Client key* E-mail* Log in Not a subscriber? Science News is a nonprofit. Support us by subscribing now. Subscribe