Making the rounds at yesterday's Ad Club meeting was Andrew J. McKeon, a former investment-banking consultant who is now a true believer in the inconvenient truth of global warming. In November, McKeon launched the nonprofit Climate Change Foundation--the name is supposed to be taken literally on two levels--and is looking for support from the ad community and marketers. The idea is to help make Americans aware of the seriousness of global warming and to raise money for the cause. "My goal is to approach companies like Starbucks and the Gap--companies that want to have a good position on this issue...