At DeSmogBlog we monitor Youtube on a daily basis looking for the videos that effectively convey the reality and urgency of global warming.

Here's this year's top 5:

#5 The Ranting Gryphon on Global Warming

Winner of the moviebakery global warming award.

#4 Boxer Tells Inhofe Who the Boss is Now

Not a true youtube video, but definitely a highlight of the year.

#3 "Arctic Sea Ice Loss 1979 to 2007

Courtesy of NASA's Goddard Scientific Visualization Studio

#2 "Fox Attacks the Environment"

By Robert Greenwald and Bravenew Films

#1 "The Most Terrifying Video You'll Ever See"

The video is the work of Oregon school science teacher, Greg Craven, who has become a youtube sensation since posting his insightful and humorous reasoning for why we need to act now to reduce our energy consumption and greenhouse gas emissions.