The pandemic is putting America’s air pollution standards to the test as the COVID-19 death toll rises.
The U.S. government sets limits on hazardous air pollutants to try to protect public health, but it can be difficult to determine where to draw the line for what is considered “acceptable risk.” Power plants, factories and other pollution sources release hundreds of million pounds of hazardous pollutants into the air every year.
As the coronavirus spreads, the pattern of deaths suggests there are serious weaknesses in the current public safeguards.
Several studies have explored connections between air pollution and severe cases of the respiratory illnesses. The latest, published on Oct. 26, estimates that about 15% of people who died from COVID-19 worldwide had had long-term exposure to fine particulate air pollution.
My research as an environmental health scientist looks closer at individual hazardous air pollutants and shows how higher rates of COVID-19 deaths across the U.S. – particularly in the South – have been associated with higher levels of pollutants, particularly diesel exhaust and acetaldehyde, a compound widely used in industry.
Many of these chemicals are all around us
The delivery boxes piled up in my living room offer a snapshot of how pervasive hazardous air pollutants can be. Toxic gases like acetaldehyde are exhaled by the paper mill that manufactured the boxes in Louisiana, the diesel trucks that delivered them, and even the gas furnace that keeps me warm as I open them. The Environmental Protection Agency regulates acetaldehyde, in part because in 1986 Dutch scientists found that it damages the respiratory system of rodents.
Acetaldehyde is quite common. In addition to being used in industry, it’s found in decaying vegetation, alcohol and cigarette smoke.
I generally don’t think about the toxic emissions resulting from my consumer behavior, but I can’t help but think about health risks now, and how to reduce them.
In the early days of the pandemic, I isolated myself. I dusted off my bicycle. I identified the contaminants in my water system and installed a reverse osmosis filter. To put it bluntly, I was afraid. Overweight men were not faring well against the virus, according to an early study, so I tried to modify my risk.
But what can I do about the air I breathe? I cannot stop the trucks from driving past my house, or the steel mill down the street from releasing emissions from its smokestack.
Studies reveal the health risks
Harvard University and Emory University have investigated the role of particulate matter, ozone and nitrogen oxides in COVID-19 deaths by comparing county death rates to pollution levels and other potential factors. Similar studies have been done in Italy, England and China.
All of these studies found an association between higher death rates from COVID-19 and long-term pollution exposure.
While the causal factors are still unclear, the association may be…
Read more:: Studies Link COVID-19 Deaths to Air Pollution