Yiannis Levendis

Still, experts agree that nitrogen oxide (pdf) is a nasty pollutant. Once released into the air it quickly converts into nitrogen dioxide—a reddish-brown gas with a pungent odor—and then absorbs sunlight to transform into the yellow-brown haze that blankets cities. It is this smog that can exacerbate dozens of health problems, including asthma, bronchitis and […]

One expert said years of cars running with ineffective emissions controls is enough to make an environmental impact. The Environmental Protection Agency estimates the cars emitted up to 40 times the legal pollution limit. “The impact is we had more pollutants from those cars emitting all the time,” said Yiannis Levendis, an engineering professor at […]