Get an original copy of the Yes Man's Fake NY Post, distributed only in NYC on September 21, in honor of the UN Climate Summit. The entire Newspaper features a myriad of real stories on real aspect of climate change, and is a classic example of guerrilla activism.  You can read about it at http://www.huffingtonpost.com/2009/09/21/the-yes-mens-latest-fake_n_293242.html.