The number of people killed or disabled by certain heart problems caused by exposure to air pollution has risen significantly since 1990: 31% worldwide, according to a study published Wednesday in the Journal of the American Heart Association.
Particle pollution is specifically to blame, the researchers say. Also called PM2.5 or particulate matter pollution, it’s the mix of solid and liquid droplets floating in the air, according to the US Environmental Protection Agency. It can come in the form of dirt, dust, soot or smoke. Particulate pollution comes from coal- and natural gas-fired plants. Cars, agriculture, unpaved roads, construction sites and wildfires can also create it.
Particle pollution is particularly deadly. PM2.5 is so tiny –- 1/20th of a width of a human hair – that you can’t see it, and it can travel past your body’s usual defenses. Instead of being breathed out when you exhale, it can get stuck in your lungs or go into your bloodstream.
The particles cause irritation and inflammation and can lead to respiratory problems. Research has found that long-term exposure to particle pollution can cause cancer, dementia, depression, breathing problems and a variety of heart problems.
For the new study, researchers analyzed nearly 30 years of death and disability data from a research set called the Global Burden of Disease 2019, which provides an estimation of how many people there are in 204 countries and includes information about mortality and disability due to exposure to particle matter pollution.
The data tracked two heart-related problems: strokes and ischemic heart disease, a condition in which the heart can’t get enough blood and oxygen, largely because of plaque buildup in the arteries.
The researchers found that the total number of premature deaths and years of heart disease-related disability that can be attributed to particle pollution exposure rose from 2.6 million in 1990 to 3.5 million in 2019. There was a 36.7% decline in premature deaths alone in that time period – but that wasn’t all good news.
Source: https://edition.cnn.com
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