A French study, published in the journal of Occupational and Environmental Medicine, suggests that the chances of a child developing leukemia may increase fourfold if they live near a gas station. The main carcinogen is benzene, which has already been identified as a cancer-causing agent for adults. Gas vapors carrying the compound are considered so hazardous that car companies have reconfigured their tanks to trap fumes release during refueling. The study's main source is a battery of 300 children treated in hospitals in Lille, Lyon and Nancy. So I guess this marks the end of sending your kids to the pumps instead of the playground just because the local petrol hut is closer to your house.