After studying sixty million elderly Americans, Harvard found that air pollution levels were "safe" and also life saving.
author of Xinhua News Agency: EU
A Study of the Harvard University School of public health shows that even the so-called "safety" level of pollution will also The life span is shortened.
, according to a June 29th study published in the June 29th Journal of the new England Journal of medicine, researchers collected about 60000000 health data of 65 years old and older in the United States for 7 years, as well as nationwide pollution data in the United States, to study the relationship between life and pollution. The total number of elderly people aged 65 and above is about 97%.
study concluded that long-term exposure to PM2.5 fine particulate matter and ozone would increase the risk of premature death. The research report says that the national PM2.5 concentration in the United States can save about 12 thousand lives a year, even if only a tiny, undetectable 1 microgram / cubic meter is reduced. If ozone concentration is reduced by 1/1000000000, it will save about 9000 lives each year.
one of the leading participants in the study, environmental epidemiology expert Joel Schwarz said, the study showed, "although we think the air quality in the United States is enough to protect our citizens, we need to further reduce the limit of the pollutants."