"Every third kid has asthma..."

"We do see a lot of kids with asthma," she said. "The number has definitely not gone down." Pat Dobosz, a preschool teacher in the neighborhood, agreed. "Our children come in at three and four, many with severe asthma diagnoses," she said. "Last year, I had a class of 18 children and about a third had a pump or aspirator on hand at the school in case of an emergency." While a number of factors can contribute to asthma, including secondhand smoke and pollen exposures, evidence increasingly points to a potent role for diesel exhaust.

http://www.huffingtonpost.com/2012/06/28/garbage-trucks-diesel-children-asthma_n_1634288.html