A study just published today the 22th August, tells a tale of how our health is being affected by pollution, in particular particulates.
Teams from across the globe recorded their daily data on mortality (number of deaths) and their air pollution levels. Teams were located in 652 cities in 24 countries or regions.
Although there are dangers known for outdoor air pollutants; sulphur dioxide, ozone and nitrogen dioxide etc, this study was just looking at very small particles. They evaluated the associations of inhalable particulate matter (PM) with a diameter of 10 μm or less (PM10) and fine PM with a diameter of 2.5 μm or less (PM2.5) with daily all-cause, cardiovascular, and respiratory mortality. In other words, they measured the particles in the air on every day and recorded number of deaths on that day.
They found that increases short-term exposure to PM10 and PM2.5 led to small but significant increases in all causes of deaths, and cardiovascular eg heart attack, and respiratory mortality eg asthma attack.
These are just 2 types of pollutants, adding in data from all pollutants lead to further deaths.
It’s a stark reminder that pollution levels need to fall to improve global health.
Liu C, et al. Ambient Particulate Air Pollution and Daily Mortality in 652 Cities. N Engl J Med. 2019 Aug 22;381(8):705-715. doi: 10.1056/NEJMoa1817364.