The short – term exposure to particulate pollutants, even at levels lower margins within the environmental authorities of that country considered safe for the population, are directly related to a greater risk of premature death. These are the data that a group of American scientists have presented after studying the rates of early deaths among the elderly in the USA.
Certain subgroups are particularly vulnerable to short-term air pollution. This percentage of mortality is higher in those people whose economy is more deficient. Logical data, taking into account they face a lack of fresh and healthy food, as well as the difficult access to health services.
The research has been carried out with a compilation of about 13 years of data, specifically from the beginning of the century to approximately 2013. Daily exposures to air pollution were evaluated using prediction models and subsequently linked the results with mortality rates of a small sample of the population.
The result suggests that we do not need to breathe contaminated air for a long time so that the symptoms do mey in our body.
“This is the most comprehensive study of short-term exposure to contamination and mortality to date,” said Francesca Dominici, a professor, co-director of the center where the project was carried out and the study’s lead author. “We found that the mortality rate increases almost linearly as air pollution increases – any level of air pollution, no matter how low it is, is detrimental to human health.”
Studies have shown that fine inhalable particles (PM2.5) and ozone, particularly’ warm season ozone’, which is found from April to September, are related to an increase in mortality rates.
According to the National Environmental Air Quality Standards (NAAQS) established by the Environmental Protection Agency (EPA), long-term exposures to PM2.5 are considered safe if they average 12 micrograms per cubic meterof air (12 μg / m3) or less per day in the course of a year.
A threat that does not understand borders
During the study period, 22 million people died in the population of the samples collected. The data indicated that what appeared to be small increases in PM2.5 actually had a huge impact when these percentages apply to the entire US population, and therefore, would have caused the additional death of thousands of people. people during those 13 years.
Those results are playing a key role in a current review of the annual NAAQS by the EPA. The new findings on the risk of short-term mortality from air pollution suggest that the EPA should re-evaluate the daily NAAQS.