The below ad was created by the Environmental Defense Fund in conjunction with the Ad Council, and is my favorite of several. The ads are all based on hard scientific data, to which links are available on their website.
About the environmental Defense Fund:
"Environmental Defense, a leading national nonprofit organization, represents more than 500,000 members. Since 1967, Environmental Defense has linked science, economics, law and innovative private-sector partnerships to create breakthrough solutions to the most serious environmental problems. We have a strong history of finding solutions, from our pioneering efforts to eradicate DDT to cutting-edge hybrid truck work with FedEx (see highlights of our work and visit our main Web site).
We've launched this campaign as a wake-up call. Global warming is the most serious environmental challenge of our time. It is more urgent and its dangers are more fundamental than most Americans realize. This campaign seeks to educate Americans about how quickly we must act, and give concrete steps that people can incorporate into their lives to fight global warming."
Learn more about the EDF here: http://fightglobalwarming.comPersonally, I consider the EDF worthy of support, and as important as the Sierra Club in the fight against those that consider the environment there to be taken advantage of, those that are too ignorant to realize the impact of their actions, and those that simply don't give a damn.