The World

Warning: Breathing Air Can Be Hazardous to Your Health

Last year some 64,000 deaths were attributed to effects of air pollution. Daniel Grossman reports from Boston on some technological fixes to this rampant public health problem being recommended by the EPA.

Last year some 64,000 deaths were attributed to effects of air pollution. Daniel Grossman reports from Boston on some technological fixes to this rampant public health problem being recommended by the EPA.