Study Finds New Reason to Ban Plastic: It Emits Methane in the Sun
The proliferation of plastic pollution has led to concerns over its impact on marine life and human health as the toxins it absorbs and emits move up the food chain. Now, a new study reveals yet another potential plastic hazard: It releases greenhouse gasses.
While the amounts released by the plastics are small, researchers are concerned that the scale of plastic production and waste means they could still contribute to climate-changing greenhouse gas emissions over time.
"Considering the amounts of plastic washing ashore on our coastlines and the amount of plastic exposed to ambient conditions, our finding provides further evidence that we need to stop plastic production at the source, especially single use plastic," lead author Dr. Sarah-Jeanne Royer said in a University of Hawaii press release.
Royer didn't set out to study plastics, BBC News reported. Instead, she was measuring the methane produced by biological organisms in sea water when she discovered that more methane was coming from the plastic bottles holding the samples.
"It was a totally unexpected discovery," she told BBC News.
Her University of Hawaii research team went on to test polycarbonate, acrylic, polypropylene, polyethylene terephthalate, polystyrene, high-density polyethylene and low-density polyethylene (LDPE), which are used commonly in food packaging, textiles, construction and other plastic goods, according to the University of Hawaii.
Polyethylene, which is used in plastic bags and is the most used and discarded plastic in the world, emitted the largest amounts of the greenhouse gasses.
After being exposed to sunlight for 212 days, LDPE emitted 176 times the methane that it had at the start of the experiment, BBC News reported.
This is because, when the plastic is exposed to sunlight, it breaks down, cracking and exposing more plastic area to the sun, which leads to greater gas emission.
Once LDPE had been exposed to the sun, it continued to emit gases even in darkness, the study found.
LDPE waste pulled from the ocean also emitted greenhouse gasses when laid out in sunlight.
While it was known that plastic releases carbon dioxide when it degrades, this is the first research to measure the emission of other greenhouse gasses.
"Research on plastic waste is revealing it to be a disturbing pandora's box," University of Geneva chemist Dr. Montserrat Filella, who was not involved with the research, told BBC News. "As research expands our knowledge, we are realising that plastics can be insidious in many other ways. For instance, as vectors of 'hidden pollutants,' such as heavy metals present in them or, now, as a source of greenhouse gases. And, in all cases, throughout the entire lifetime of the plastic."Royer is now working on estimating the amount of plastic exposed to sun globally so that she can find ways to limit its contribution to the greenhouse gas emissions that cause climate change, according to the University of Hawaii.
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As protests are taking place across our nation in response to the killing of George Floyd, we want to acknowledge the importance of this protest and the Black Lives Matter movement. Over the years, we've aimed to be sensitive and prioritize stories that highlight the intersection between racial and environmental injustice. From our years of covering the environment, we know that too often marginalized communities around the world are disproportionately affected by environmental crises.
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BiOceanOr's AquaREAL system. BiOceanOr
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The big three broadcast channels failed to cover the disproportionate impacts of extreme weather on low-income communities or communities of color during their primetime coverage of seven hurricanes and one tropical storm over three years, a Media Matters for America analysis revealed.
Researchers at the pharmaceutical giant Eli Lilly announced yesterday that it will start a trial on a new drug designed specifically for COVID-19, a milestone in the race to stop the infectious disease, according to STAT News.
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The sixth mass extinction is here, and it's speeding up.
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With more than 1.7 million confirmed cases of COVID-19 in the United States and more than 100,000 deaths from the virus, physicians face unprecedented challenges in their efforts to keep Americans safe.
They also encounter what some call an "infodemic," an outbreak of misinformation that's making it more difficult to treat patients.
When Leaders and Doctors Spread Misinformation<p>When people in charge of towns, cities, states, and countries spread misinformation, the potential for belief in misinformation to result in policies can have harmful effects.</p><p><a href="https://www.northwell.edu/find-care/find-a-doctor?q=Bruce+E.+Hirsch%2C+MD&insurance=&location=&query_type=provider&physician_partners=false&default_view=list&gender=&language=&sort=relevancy" target="_blank">Dr. Bruce E. Hirsch</a>, attending physician and assistant professor in the infectious disease division of Northwell Health in Manhasset, New York, says an example of this is when President Trump informed the public he was taking hydroxychloroquine as a preventive measure.</p><p>"To approach this enormous challenge, we need some intellectual honesty and clarity, and to disregard expertise and to make decisions and model decisions based on hunches is inviting us to handle challenges on the basis of rumor and uninformed opinion. The magnitude of that error is epic," Hirsch told Healthline.</p><p>Stukus agrees, noting that the harm of this proclamation is documented.</p><p>"Early on when the president touted the benefits of hydroxychloroquine and azithromycin, people started to hoard this medicine, and state boards had to shut it down because they were getting so many prescriptions for this unproven therapy that it was not available for those who truly needed it, such as those who have lupus and autoimmune conditions," Stukus said.</p><p>He adds that calls to poison control centers increased after the president suggested using disinfectant to prevent contracting the new coronavirus.</p>
Listen to Science, Even When it Changes<p>When recommendations change or evidence flip-flops, skepticism may arise. However, Stukus says change is the beauty of science.</p><p>"That shows us that we can evolve, and if the evidence shows that our prior thoughts were incorrect, we need to be able to change our recommendations and advice based upon the best quality of evidence at the time," he said.</p><p>Pierre agrees.</p><p>"Science is an iterative process, whereby we arrive at facts and truth through repeated and controlled observations. That means that it's inherently self-correcting as we revise conclusions based on ongoing research. Scientific facts aren't immutable dogma chiseled on a tablet. They change based on the best available evidence we have at a given point in time," he said.</p><p>Because research of COVID-19 has only been underway for 6 months, information is evolving rapidly, and new information may contradict old.</p><p>"There's still much we don't know about exactly how [COVID-19] spreads, what effects it has on the body, or how to best treat it. That means that the best available evidence is preliminary, but that doesn't mean that we should ignore it or turn to other sources of information or opinion as if they're just as valid," Pierre said.</p><p>He explains that conspiracy theories based on mistrust lead to vulnerability to misinformation.</p><p>If people mistrust science because it sometimes "changes its mind," Pierre said, "that shouldn't be used to embrace other opinions based on no evidence at all, which are typically selected based on confirmation bias: what we want to believe rather than what the objective evidence supports."</p>
Where to Find the Best Information<p>Stukus says to start with the <a href="https://www.cdc.gov/coronavirus/2019-nCoV/index.html" target="_blank">CDC</a> and <a href="https://www.nih.gov/health-information/coronavirus" target="_blank">NIH</a>. Then check with your local health officials, because COVID-19 guidelines may vary depending on where you live.</p><p>If you can't find information you need or have questions specifically related to you, call your primary care doctor.</p><p>"Your personal doctor should always be a resource for individual specific questions because they know best how to apply all the nuances retaining to your health, and how to incorporate all the other general [COVID-19] recommendations," Stukus said.</p><p><a href="https://www.eehealth.org/find-a-doctor/b/boyd-laura-b/" target="_blank">Dr. Laura Boyd</a>, primary care physician at Edward-Elmhurst Health Center in Elmhurst, Illinois, says her clinic receives a lot of calls about COVID-19.</p><p>"Most doctors' offices are receiving calls and answering questions, and doing phone or video visits to help clarify and/or order testing over the phone based on patients' symptoms. It is always best to call your doctor's office first instead of worrying about symptoms and waiting too long to seek treatment," she told Healthline.</p><p>If your primary care doctor has limited testing, she suggests looking on your state's public health website for available testing sites.</p><p>With a lot of unknowns related to this virus and disease, Boyd says many patients are feeling overwhelmed and anxious for a treatment.</p><p>"Unfortunately, there is no specific medication recommended for COVID for outpatient. There are a lot of ongoing studies with various drugs going on within the hospital setting. Patients should always contact their doctors about their specific symptoms as they can treat the symptoms that go along with COVID, but there is no cure," Boyd said.</p><p>While we wait for treatment and a vaccine, Hirsch, who treats patients hospitalized for COVID-19 complications on a daily basis, says everyone can do their part by washing hands, wearing a mask, and staying 6 feet apart.</p><p>"As an infectious disease doctor working in the hospital, I see the damage of the pandemic and the worst cases of what's happening. We are trying to get the best possible outcome and confronting this overwhelming biologic reality of this terrible epidemic the best we can," Hirsch said.</p><p>Everyone at home can help in the fight too, he adds.</p><p>"Follow information that is science- and evidence-based, and avoid that which is not," he said.</p>
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