Increasing smog level rises deaths in cities, new study suggests

A study of 95 urban areas in the U.S. showed that a small increase of the &to=http://english.pravda.ru/main/2002/09/03/35860.html' target=_blank>smog level leads to a slight rise in deaths.

A study of 95 U.S. urban areas found that a small increase in the average smog level over seven days can lead to a 0.5% rise in deaths, many from heart and lung disease, on the seventh day, reports USA Today.