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Dirty air makes people stupid

01.09.2018

According to a new study by scientists in the US and China, prolonged exposure to polluted air affects human cognitive performance.

To investigate the link between air pollution and cognition, the researchers turned to the results of the China Family Panel Studies, an annual test of Chinese citizens that includes verbal and mathematical tests of cognitive performance. The scientists especially focused on the results obtained from 2010 to 2014 in 162 randomly selected Chinese regions. In total, about 20 people participated in the study in this way.

They then used official air pollution data to calculate how much a person was exposed to it between inspections. So scientists were able to determine how dirty air affects the human intellect.

The results were rather unpleasant, especially in the case of older people. “We already understand that air pollution can reduce the level of education for a whole year, which is a huge figure,” says Qi Chen, one of the researchers. “But we also found that this effect is even more pronounced in older men over 64 and with low level of education. If you calculate the cognitive losses for them, then there the number goes on for several years. "

Researchers do not yet know why pollution has such an effect. But they are sure that it causes mental decline - that is, it is not just a correlation between the two indicators. Perhaps the whole point is that such air adversely affects the white matter in the brain.

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