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Indigenous Efforts Use Hemp to Remove Forever Chemicals From Superfund Site

The former Loring Air Force Base, in Limestone, Maine, on the Canadian border, closed in 2007, is now owned by the Aroostook Band of Micmacs. The superfund site is so polluted that the U.S. Environmental Protection canva.com Agency gave it a waiver, deeming it technically impractical to clean, being loaded with per- and polyfluoroalkyl substances (PFAS), cancer-causing compounds commonly known as “forever chemicals". PFAS tend to bioaccumulate, building up in soil, water, animals and humans; they can persist for hundreds or thousands of years and have been linked to kidney and testicular cancer, liver damage and suppressed immunity.

In the spring of 2019, the Micmac Nation, nonprofit Upland Grassroots and their research partners began an experiment. Hemp is a good candidate for phytoremediation because it grows fast across much of the country. Its roots are deep and profuse to better absorb pollutants from the soil. By 2020, researchers discovered that the hemp plants were successfully sucking PFAS out of the contaminated soil via phytoremediation and hope that their example may help farmers that have discovered their soil is tainted. Micmac Chief Edward Peter-Paul says, “Anything we can do to contribute to making the environment better, we want to be a part of.” Robbie Girling, an associate professor of agroecology, and other researchers at the UK Centre for Ecology & Hydrology at the University of JJ Gouin/AdobeStock.com Reading and the University of Birmingham discovered that air pollutants can confuse pollinators that use odors to navigate and move around and communicate. A study they published in Environmental Pollution shows that ozone and diesel exhaust significantly reduce the presence of pollinators, the number of times pollinators visit plants and how many seeds the plants produce. James Ryalls, one of the authors of the study, says, “Some bugs might get the first sniff when chemical compounds from a flower land on their antennae. They then follow that odor plume like a treasure map back to the plant.”

After feeding, Girling says insects such as honeybees learn which compounds lead to the tastiest flowers and return to them. But ozone and diesel exhaust can muddy those perfumes. “The [pollutants] can degrade the signal that they use, so they might not be able to find the flower anymore. Insects are under a lot of pressure at the moment from human influence, and when you start to push at things from all different directions, at some point, they can’t stand up to it. And they collapse.”

Good health and good sense are two of life’s greatest blessings. ~ Publilius Syrus