KT Tunstall and Josh Hartnett want the rest of us to cut back on our CO2 emissions so we can “defeat global warming” in 10 years. KT makes carbon-neutral music, but can’t lay off the private planes on holidays. I don’t begrudge anyone a private plane, and I’m all for conserving energy to save money, but I’m a little tired of sanctimonious superstars telling me to change the light bulbs at home and buy a Prius when my 1996 Honda Civic still gets up to 36mpg and is all paid off.