About that oil spill off the Louisiana coast: It was my fault. Well, not just my fault, but the fault of everyone who, like me, hasn't done everything possible to limit the amount of gasoline we use. BP, and perhaps Halliburton, shares responsibility for the accident. But every time I drive to work when I could bike, or drive to the store when I could walk, I'm contributing to the demand that keeps these offshore oil rigs running. There's a private high school near my house. I see a lot of kids who drive cars to school, even though the Minneapolis school district provides free busing. The roads are full of people driving big SUVs. When we look at the images of oil washing up on the Louisiana shoreline, we should connect the dots and work on changing our own behavior. MARY RUMSEY, MINNEAPOLIS