California tops with most air polluted cities
Concerned about the severe impacts of air pollution on their health, millions of Americans are urging the Environment Protection Agency (EPA) to adopt stronger ozone standards that will protect the population from breathing this dangerous air pollutant. The clamor was sparked after the latest study of the American Lung Association’s State of the Air 2007 reported that the air is still not clean enough to be considered safe to breathe in some identified parts of the United States. It also cited medical researches that millions are at risk from smog even at the levels the EPA has considered safe. What are ozone and particulate matter? Ground level ozone is the prime ingredient of smog, the pollution that blankets many urban areas during the summer. “When inhaled, even at low levels, ozone can cause respiratory problems and aggravated asthma in children, the elderly, those with respiratory diseases and even healthy adults who are working or exercising outside on a smoggy day,” science stu...