The cause seems to be brain inflammation provoked by tiny, solid particles
for your health. That is well known. Polluted air increases the risk of strokes, heart disease and a list of respiratory illnesses that include asthma and lung cancer. High pollution levels are also linked to low productivity at work and poor scores on academic tests. But pollution may have a yet-more-sinister effect. It may also promote suicide., examined suicides throughout America between 2003 and 2010.
Suicide rates vary for many reasons, so the two researchers concentrated on correlating day-to-day changes in the number of suicides in particular places with fluctuating air-pollution levels caused by alterations in wind direction. In Boston for example, north-easterlies blowing into the city from industrial areas bring air carrying around five micrograms per cubic metre more2.5 than westerlies from upstate Massachusetts.
Their analysis, published as a working paper by the National Bureau of Economic Research, in Cambridge, Massachusetts, found that an increase of one microgram per cubic metre in2.5 in a given place was linked to an average rise in daily suicide rates of just under 0.5%, and if that increased level was sustained for a month, hospital admissions connected with attempted suicides rose by 50%.
They suggest poor air quality worsens moods, which in turn increases the likelihood of someone experiencing suicidal thoughts. In a separate analysis they took data from surveys that asked people about their mood and mental state. They tested whether the answers were related to pollution levels in respondents’ home towns in the month leading up to the survey.2.
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