Improved air quality leads to fewer L.A.-area kids developing asthma. Scientists have linked nitrogen dioxide and fine particulate matter reductions to a decrease in new asthma cases, reinforcing the health detriments of air pollution.

See the source article by following the link below:
Improved air quality leads to fewer L.A.-area kids developing asthma. Scientists have linked nitrogen dioxide and fine particulate matter reductions to a decrease in new asthma cases, reinforcing the health detriments of air pollution.