Famous author of The Skeptical Environmentalist (and many other thoughtful books) Bjorn Lomborg has an interesting essay in today's Wall Street Journal titled The Climate-Industrial Complex.
Lomborg: "Naturally, many CEOs are genuinely concerned about global warming. But many of the most vocal stand to profit from carbon regulations. The term used by economists for their behavior is "rent-seeking."
Money quote: "The partnership among self-interested businesses, grandstanding politicians and alarmist campaigners truly is an unholy alliance."
Update: Contrary to widely held belief, Lomborg isn't at all skeptical that global warming is a problem, or that humanity is contributing to it. Here's a recent interview with Bjorn Lomborg by Gene Epstein of Barron's.