Lead Exposure Linked to 412,000 Premature Deaths in U.S. Each Year
Of that figure, exposure to the toxic metal may be an "important, but largely overlooked" risk factor behind the 256,000 annual cardiovascular disease deaths in the country, the authors found.
“Our study findings suggest that low-level environmental lead exposure is an important risk factor for death in the USA, particularly from cardiovascular disease," the paper states. "It is not surprising that lead exposure is overlooked; it is ubiquitous, but insidious and largely beyond the control of patients and clinicians."
New research from @TheLancetPH: Historical #lead exposure may be linked to 256000 premature deaths from #CVD in adu… https://t.co/uMIa3PImdz— The Lancet (@The Lancet)1520894701.0
The researchers used data from the National Health and Nutrition Examination Survey to study the blood-lead levels of 14,289 people who were 20 or older between 1988 and 2011. Of the 4,422 people who died by the end of that period, those who had high lead levels (6.7 micrograms per deciliter) were at 37 percent greater risk of premature death from any cause and 70 percent times greater risk of cardiovascular death compared with people with lower lead levels (1.0 micrograms per deciliter).
Based on these risk levels, the authors estimated that up to 18 percent of all deaths every year in the USA (or 412,000 out of 2.3 million annual mortalities) would be among people who had levels of lead above 1 micrograms per deciliter. Further, an estimated 28.7 percent of premature cardiovascular disease deaths (256,000 out of 892000) could be attributable to lead exposure.
Additionally, the authors suggested the current proportion of deaths in adults aged 44 years or older could have been prevented if historical exposure to lead had not occurred.
America's Lead Poisoning Problem Is Everywhere https://t.co/naGb7EcB1R @ErinBrockovich @MMFlint @sierraclub @ewg https://t.co/AyWL71a7Ci— EcoWatch (@EcoWatch)1454778490.0
"Today, lead exposure is much lower because of regulations banning the use of lead in petrol, paints and other consumer products, so the number of deaths from lead exposure will be lower in younger generations. Still, lead represents a leading cause of disease and death, and it is important to continue our efforts to reduce environmental lead exposure," explained lead author professor Bruce Lanphear, from Simon Fraser University in Canada, in a statement.
"Our study calls into question the assumption that specific toxicants, like lead, have 'safe levels,' and suggests that low-level environmental lead exposure is a leading risk factor for premature death in the USA, particularly from cardiovascular disease," Lanphear added.
In a press release, the authors noted some limitations to their research, "including that their results rely on one blood lead test taken at the start of the study and therefore cannot determine any effect of further lead exposure after the study outset. The authors were also unable to control for all potential confounding factors, such as exposure to arsenic or air pollution, which are also risk factors for cardiovascular disease."
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Jean-Marc Neveu and Olivier Civil never expected to find themselves battling against disposable mask pollution.
When they founded their recycling start-up Plaxtil in 2017, it was textile waste they set their sights on. The project developed a process that turned fabrics into a new recyclable material they describe as "ecological plastic."
Mounting Piles of Waste<p>It is not only the streets of Chatellerault where pandemic pollution is piling-up, but also the world's beaches and oceans. Once there, they can take up to 450 years to degrade and disappear.</p><p>Esther Röling, co-organizer of the annual Adventure Clean Up Challenge held on Hong Kong Island, has seen this waste firsthand. In October the sports challenge pitted teams against one another in a competition to remove trash from 13 hard-to-reach coastal areas around the city.</p><p>They find tons of both disposable and reusable masks, said Röling. "You wonder how it ended up there. Was it just thrown on the ground? Or was it in a garbage bag that broke open?"</p><p>Almost 10,000 kilometers away in Antibes on the sunny French Riviera, it's a similar picture. For the past few months, divers and clean-up volunteers working with an ocean clean-up non-profit called Operation Mer Propre have been collecting an increasing number of masks found on land and in the sea.</p><p>"Since the beginning of the lockdown when we started to count, we've reached 800, 900, [and now in total] 1000 masks," said co-founder Joko Peltier. </p><p>According to <a href="https://unctad.org/news/growing-plastic-pollution-wake-covid-19-how-trade-policy-can-help" target="_blank">UN estimates</a>, up to 75% of all coronavirus-related plastic could end up as waste in oceans and landfills.</p>
The Limits of Recycling<p>Yet not all are convinced the recycling of this waste is possible on a global scale. </p><p>"What those citizen groups are doing is really beneficial but once they collect it, it should just go to a landfill or an incinerator. They shouldn't necessarily expect it to get recycled," said Jonathan Krones, an industrial ecologist and visiting assistant professor of environmental studies at Boston College.</p><p>That's because mask recycling programs like Plaxtil are few and far between and most don't have the benefit of a readily adaptable production process. </p><p>Even in countries with solid recycling infrastructure, he says, the system is designed to separate out specific types of waste like bottles or cardboard.</p><p>"I imagine that it would be technically feasible to develop a separation process to filter out masks, but there simply aren't enough of them to make that economical," he said.</p><p>Collection is a big hurdle, he adds. Since each mask only weighs a fraction of a gram and they're scattered on roads or mixed with other trash, it is difficult and costly. </p><p>"You need a lot of raw material of the right quality to make investing in the recycling technology and the recycling system worthwhile," he said.<span></span><br></p>
Hemp, Sugar Cane and Sustainable Alternatives<p>Some projects are instead addressing the material used to make masks.</p><p>French company Geochanvre have created a mask made primarily from hemp, while in Australia, researchers at the Queensland University of Technology are experimenting with a disposable product made from agricultural waste. </p><p>Biodegradable options are exciting alternatives to reduce the fossil fuels needed for the creation of plastic-based masks, said Krones, but they don't absolve the wearer from the responsibility of what happens afterwards. </p><p>Bio-based masks often need their own composing solutions, he explains, because in landfill they can produce high amounts of the greenhouse gas methane when anaerobic bacteria feeds on the organic material. Methane is known to be significantly more potent than carbon dioxide.</p><p>"I think as long as we have in our mind that we want to have disposability, we're going to have to wrestle with a variety of different sorts of environmental tradeoffs," he said, adding that reusable, fabric masks are the best option available to most people.</p><p>Precimask is developing a clear face covering with an optional visor made from hard plastic, designed to be long-lasting.<br></p><p>Air enters either side of the cheeks through a technology normally found in pool filters and car exhaust systems, said company spokeswoman Juliette Chambet.</p><p>"We wanted to make ceramic-based filters that would be washable and cleanable, which would allow them to be reused as many times as desired without having to buy a new consumable or produce waste," she said. </p><p>Ultimately, encouraging mask wearers to think about the entire lifecycle of a mask is key, explains Neveu. </p><p>"We want people who put on the masks to realize that they are also responsible for the waste, he said. "It's not inevitable that this [pandemic] will become an environmental catastrophe.</p><p><em>Reposted with permission from </em><em><a href="https://www.dw.com/en/covid-19-recycling-pollution-trash-pandemic/a-55707817" target="_blank">Deutsche Welle</a>.</em><a href="https://www.ecowatch.com/r/entryeditor/2649032193#/" target="_self"></a></p>
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