How Bad Is the Cognitive Impact of Air Pollution?

Greenstone analyzed data that included roughly forty thousand people living in urban areas within a five degree latitude range north and south of the river. The first outcome he looked at was life expectancy. On average, they're living about three years less than people born just to the south. In subsequent research soon to be released, greenstone looked at the educational outcome of kids born between 19 75 and 19 82. Here he's trying to estimate the cognitive effects of coal pollution.