Lawn equipment spews ‘shocking’ amount of air pollution, new data shows
Lawn equipment spews ‘shocking’ amount of air pollution, new data shows
Excerpt from this story from Grist:
Lawn-care equipment — leaf-blowers, lawnmowers, and the like — doesn’t top most people’s lists of climate priorities. But a new report documents how, in aggregate, lawn care is a major source of U.S. air pollution.
Using the latest available data from the Environmental Protection Agency’s 2020 National Emissions Inventory, the report found that the equipment released more than 68,000 tons of smog-forming nitrous oxides, which is roughly on par with the pollution from 30 million cars. Lawn equipment also spewed 30 millions tons of climate-warming carbon dioxide, which is more than the total emissions of the city of Los Angeles.
“When it comes to these small engines in lawn and garden equipment, it’s really counterintuitive,” said Kirsten Schatz, the lead author of the report and a clean air advocate at Colorado PIRG, a nonprofit environmental organization. “This stuff is really disproportionately causing a lot of air pollution, health problems, and disproportionately contributing to climate change.”
Lawn equipment also contributed to a litany of other air toxics, such as formaldehyde and benzene, according to the report, which is titled “Lawn Care Goes Electric.” But perhaps the most concerning pollutant it releases is the fine particulate matter known as PM2.5.
PM2.5 is far smaller than the width of a human hair and can lead to health problems ranging from cancer, reproductive ailments, and mental health problems to premature death. The report found that gas-powered lawn equipment belched 21,800 tons of PM2.5 in 2020 — an amount equivalent to the pollution from 234 million typical cars over the course of a year.
That outsize impact comes because gas-powered lawn equipment runs on different types of engines than passenger cars. They are smaller — coming in two- and four-stroke versions, which reference the differences in the engines’ combustion cycles — and are generally less efficient, with two-stroke engines being particularly problematic because they run a mix of lubricating oil and gasoline.
“[This] really inefficient engine technology is, pound for pound, more polluting than the cars and trucks,” said Schatz. “Outdoor equipment generates a pretty shocking amount of pollution.”