The US had just two 500-foot smokestacks in 1970 and more than 180 by 1985 to dilute local pollution; the taller stacks sent emissions farther downwind and helped spread acid rain
US had just two 500-foot smokestacks An effort by American power companies to reduce local air pollution in the 1970s ended up creating a much wider environmental crisis, turning a local health problem into a continent-wide acid rain emergency. By building huge smokestacks to send coal emissions away from nearby towns, power companies pushed sulfur…