Anderson Cooper
(Images: CNN Worldwide — All Rights Reserved 2007 ©)

Jeff Corwin with polar bear cubBeginning tonight at 9 p.m. ET/PT, CNN will air a two-part documentary that takes viewers to the front lines of environmental change.

Hosted by CNN anchor Anderson Cooper (above), chief medical correspondent Dr. Sanjay Gupta, and Animal Planet host/wildlife biologist Jeff Corwin, Planet in Peril will focus on four main issues: climate change, deforestation, species loss, and overpopulation. The four-hour documentary was filmed across four continents and 13 countries (see Corwin with an Arctic cutie).

Check out the film’s interactive website, including a trailer for the documentary that features a new song from R.E.M. Below, an amusing collection of outtakes: