Why should I change a DAMN THING about my lifestyle when I'm not convinced I'm doing anything to perpetuate global warming?
Because the majority of us who do believe you are doing something to perpetuate global warming are going to elect people who will encourage you to change your ways - either through taxation or legislation. And I for one will enjoy you crying about as it happens.
You think making me change all my lightbulbs in my house is going to make a lick of difference?
Yes. It will save you money and reduce CO2 emissions. There is no single magic bullet to reducing CO2 emissions, but Compact Fluorescent Bulbs are a step in the right direction and could have a material effect on power consumption if widely adopted.
Chris.