What IIT scientists are not telling govt about air pollution

There is something cyclical about the air pollution debate in Delhi - almost like the seasonal cycle of air pollution itself. When air pollution control slows down and the courts step in to demand action against the killer pollution, especially toxic vehicular fumes, the city gets swamped with 'scientific facts' to prove that all other pollution sources matter more than the vehicles. Instead of science becoming an enabler, it confounds action.