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Windborne Microplastics Are Everywhere
By Jordan Davidson
Plastic gets around. Previously, researchers had discovered fragments of microplastics in the world's most remote locations, like the depths of the Marianas Trench and Antarctica. New research has shown that microplastics rain down on the pristine peaks of the Pyrenees mountains.
The researchers found a daily rate of plastic pollution falling from the sky in the Pyrenees was comparable to the amount raining down on Paris and Dongguan, a large industrial city in China, NPR reported.
"It was incredible how much microplastic was being deposited," said Deonie Allen, a researcher at EcoLab in the School of Agricultural and Life Sciences in Toulouse, France, as reported by National Geographic. There were no obvious sources for the microplastics within 60 miles, said Allen, the lead author of the study published Monday in Nature Geoscience.
The study is the first of its kind to show the how far microplastics can travel on the wind. Scientists had previously thought that atmospheric microplastic pollutants would rise up and settle again near the cities and industrial hubs where they originated.
The researchers looked at computer models of wind patterns to pinpoint the source of the microplastics, but none was found within a 60-mile radius of the region — which is sparsely populated and without commercial, industrial or large agricultural centers. While scientists know how dust gets blown and travels from the Sahara to Europe, they know very little about how microplastics move.
"We don't have this sort of material in nature," said Deonie Allen, as NPR reported. She noted that microplastics vary in shapes and density, which might alter how long they remain wind-borne. The researchers also suspect that rain or snow carries some particles down to the ground, but they don't need precipitation to fall to Earth, according to NPR.
Microplastics, which measure less than one-fifth of one-inch, have been shown to affect the health and reproductive systems of marine life. In fact, they were present in every marine mammal that researchers looked at in a recent British study. Microplastics also contaminated the drinking water, according to The Guardian.
The new study suggests that humans will not only consume microplastics, but also inhale them. "We ... don't know what they do to humans," said Allen to NPR. "They're a brand new [type of] pollution, but there's so much of it and it's increasing so fast that it's something we really need to start learning about."
Yet, there are some things we do know. Microplastics smaller than 25 microns can enter the human body through the nose or mouth and those less than five microns can end up in lung tissue. And, we know that microplastics tend to be sticky and accumulate heavy metals like mercury and persistent organic pollutants, including materials with known health impacts, according to National Geographic.
To make matters worse, the researchers say that atmospheric plastic pollution is nearly impossible to clean up, so the only solution is to produce less plastic, according to Science.
EcoWatch Daily Newsletter
By Emily Deanne
Shower shoes? Check. Extra-long sheets? Yep. Energy efficiency checklist? No worries — we've got you covered there. If you're one of the nation's 12.1 million full-time undergraduate college students, you no doubt have a lot to keep in mind as you head off to school. If you're reading this, climate change is probably one of them, and with one-third of students choosing to live on campus, dorm life can have a big impact on the health of our planet. In fact, the annual energy use of one typical dormitory room can generate as much greenhouse gas pollution as the tailpipe emissions of a car driven more than 156,000 miles.
By Lorraine Chow
Kokia drynarioides is a small but significant flowering tree endemic to Hawaii's dry forests. Native Hawaiians used its large, scarlet flowers to make lei. Its sap was used as dye for ropes and nets. Its bark was used medicinally to treat thrush.
States that invest heavily in renewable energy will generate billions of dollars in health benefits in the next decade instead of spending billions to take care of people getting sick from air pollution caused by burning fossil fuels, according to a new study from MIT and reported on by The Verge.
Hawaii's Kilauea volcano could be gearing up for an eruption after a pond of water was discovered inside its summit crater for the first time in recorded history, according to the AP.
By Kristin Ohlson
From where I stand inside the South Dakota cornfield I was visiting with entomologist and former USDA scientist Jonathan Lundgren, all the human-inflicted traumas to Earth seem far away. It isn't just that the corn is as high as an elephant's eye — are people singing that song again? — but that the field burgeons and buzzes and chirps with all sorts of other life, too.
Humanity faced its hottest month in at least 140 years in July, the US National Oceanic and Atmospheric Administration (NOAA) said on Thursday. The finding confirms similar analysis provided by its EU counterparts.
By Hans Nicholas Jong
Indonesia's president has made permanent a temporary moratorium on forest-clearing permits for plantations and logging.
It's a policy the government says has proven effective in curtailing deforestation, but whose apparent gains have been criticized by environmental activists as mere "propaganda."