You know what caused the Sept. 11 attacks? Carbon dioxide

Letters to the International Herald Tribune - How to Fight Climate Change - NYTimes.com

The only way to effectively address climate change is for our leaders to make it an issue of national security: Emphasize the link between consumption of fossil fuels, especially foreign oil, and the rise of international terrorism. Once that link is clearly established, people will be willing to make an effort: The home-front will contribute to fighting against terrorism, which threatens every one of us. People will understand that there is no way to put a value on the lives of any of the nearly 3,000 people who perished in the Sept. 11 attacks, and that any effort is worth making to prevent recurrence of such a tragedy.