Scientists Develop 'Infinitely' Recyclable Plastics Replacement
One of the factors driving the plastic pollution crisis is that very little of it gets reused effectively—as of 2015, only 9 percent of all plastics ever made had been recycled, a 2017 Science Advances study found.
This is because, as ScienceNews explained, when plastics break down, they usually break down into molecules that can't be easily reshaped into plastics or other useful items without going through many different chemical processes.
But researchers at Colorado State University (CSU) have developed a potential solution to the plastic recycling problem.
In an article published in Science today, they unveiled a new polymer with many of the same characteristics as plastic that can be more easily returned to its original molecules to be recycled, without the need for toxic chemicals or complicated lab processes, a CSU press release reported Thursday.
"The polymers can be chemically recycled and reused, in principle, infinitely," Eugene Chen, a CSU chemistry professor whose lab developed the material, said.
Polymers, of which plastics are one type, are made from chains of repeating molecules. The new polymer developed by Chen's lab shares important characteristics with plastic such as strength, durability, lightness and heat resistance.
The recent polymer builds on another developed by Chen's lab in 2015, which could only be made under commercially impractical cold conditions. It was also softer than plastic, with less heat resistance and molecular weight.
But Chen said the lessons learned from that polymer were essential to developing the newer model, which can be made without solvents and under room temperature conditions that could be more easily replicated by industry. It can also be easily broken down using a catalyst and returned to its original shape for reuse.
The polymer still needs more work before it will be available commercially. Chen and his team have received a grant from CSU ventures that they are using to develop an even cheaper, more efficient process for developing similar polymers, as well as exploring how they can be produced on a larger scale. But Chen thinks he and his team are headed in the right direction.
"It would be our dream to see this chemically recyclable polymer technology materialize in the marketplace," Chen said in the press release.If Chen makes that dream come true, his work could aid governments and businesses as they work to reduce plastic pollution. Just a day before his paper was published, more than 40 UK businesses joined a UK Plastics Pact that aims, among other things, to source 30 percent of the UK's packaging from recyclable sources by 2025.
Scientists Accidentally Develop 'Mutant' Enzyme That Eats Plastic https://t.co/JuDwP6oSmZ @savingoceans @PlasticPollutes— EcoWatch (@EcoWatch)1523999111.0
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At first glance, you wouldn't think avocados and almonds could harm bees; but a closer look at how these popular crops are produced reveals their potentially detrimental effect on pollinators.
Migratory beekeeping involves trucking millions of bees across the U.S. to pollinate different crops, including avocados and almonds. Timothy Paule II / Pexels / CC0<p>According to <a href="https://www.fromthegrapevine.com/israeli-kitchen/beekeeping-how-to-keep-bees" target="_blank">From the Grapevine</a>, American avocados also fully depend on bees' pollination to produce fruit, so farmers have turned to migratory beekeeping as well to fill the void left by wild populations.</p><p>U.S. farmers have become reliant upon the practice, but migratory beekeeping has been called exploitative and harmful to bees. <a href="https://www.cnn.com/2019/05/10/health/avocado-almond-vegan-partner/index.html" target="_blank">CNN</a> reported that commercial beekeeping may injure or kill bees and that transporting them to pollinate crops appears to negatively affect their health and lifespan. Because the honeybees are forced to gather pollen and nectar from a single, monoculture crop — the one they've been brought in to pollinate — they are deprived of their normal diet, which is more diverse and nourishing as it's comprised of a variety of pollens and nectars, Scientific American reported.</p><p>Scientific American added how getting shuttled from crop to crop and field to field across the country boomerangs the bees between feast and famine, especially once the blooms they were brought in to fertilize end.</p><p>Plus, the artificial mass influx of bees guarantees spreading viruses, mites and fungi between the insects as they collide in midair and crawl over each other in their hives, Scientific American reported. According to CNN, some researchers argue that this explains why so many bees die each winter, and even why entire hives suddenly die off in a phenomenon called colony collapse disorder.</p>
Avocado and almond crops depend on bees for proper pollination. FRANK MERIÑO / Pexels / CC0<p>Salazar and other Columbian beekeepers described "scooping up piles of dead bees" year after year since the avocado and citrus booms began, according to Phys.org. Many have opted to salvage what partial colonies survive and move away from agricultural areas.</p><p>The future of pollinators and the crops they help create is uncertain. According to the United Nations, nearly half of insect pollinators, particularly bees and butterflies, risk global extinction, Phys.org reported. Their decline already has cascading consequences for the economy and beyond. Roughly 1.4 billion jobs and three-quarters of all crops around the world depend on bees and other pollinators for free fertilization services worth billions of dollars, Phys.org noted. Losing wild and native bees could <a href="https://www.ecowatch.com/wild-bees-crop-shortage-2646849232.html" target="_self">trigger food security issues</a>.</p><p>Salazar, the beekeeper, warned Phys.org, "The bee is a bioindicator. If bees are dying, what other insects beneficial to the environment... are dying?"</p>
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