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By Stuart Braun
1.3 billion plastic bottles are sold daily around the world. And that's just the tip of the fossil-based plastic iceberg. Plastic preserves our food. It's in the nylon and polyester we wear, and it protects medical staff from the coronavirus.
Petroleum-based plastics dominate the market because they're durable, light-weight and cheap, but most of them can't be recycled or reused.
A raft of new bioplastic innovations is starting to catch up, though. And, unlike unsustainable fossil fuels, they are derived from renewable sources.
While bioplastics have the same molecular structure as petroleum-based plastics, which take hundreds of years to decompose, research shows that biomass-based polymers are also more likely to biodegrade and break down, including in industrial compost facilities. Bioplastic proponents believe they are key to making plastic part of a circular economy.
Here's a look at five ingredients that could make bioplastics competitive with traditional plastics.
1. Olive Pits
Countries that produce a lot of olive oil have a byproduct that can be used for plastic: olive pits. A Turkish startup called Biolive began creating a range of began creating a range of bioplastic granules created from olive seeds that result in bio-based, partially biodegradable products that can decompose in a year.
The active ingredient oleuropein found in olive seeds is an antioxidant that extends the life of the bioplastic while also hastening composting of the material into fertilizer within a year.
And since Biolive's granules act like fossil fuel-based plastics, plastic producers can simply substitute the conventional granules without disrupting the production cycle for industrial products and food packaging.
Biolive claims that by utilizing olive oil waste, production costs are reduced by up to 90% in relation to some existing bioplastics. This is important says founder Duygu Yilmaz, since starch-based bioplastics made from corn are often more expensive than petroleum-based plastics are therefore not a viable alternative.
In 2019, award-winning Biolive was chosen to represent Turkey at the United Nations Development Programme.
2. Sunflower Hulls
Like olive seeds, the husks of sunflower seeds used for oil production is a waste product also being used to created bioplastics. And luckily, they're in near endless supply.
The German start-up Golden Compound has created a unique Sustainable Sunflower Plastic Compound bioplastic – referred to as S²PC. It's reinforced with sunflower hulls, which they claim are 100% recyclable.
The S²PC bioplastic is being moulded into everything from office furniture to recyclable transport and storage boxes and crates.
Golden Compound also produces a "green" bioplastic that is 100% biodegradable, GMO-free and can be fully composted at home. Products include award-winning, world-first biodegradable coffee capsules, plant pots and coffee mugs.
The German start-up attributes the success of its bioplastics to performance. "In the end, the only reason people will be willing to switch, is if it works," Marcel Dartée, General Manager at Golden Compound, told the Plastic Today trade publication.
3. Fish Waste and Algae
The growing attempt to transform organic waste into plastic now includes fish processing refuse.
A UK initiative called MarinaTex is using fish skin and scales – 500,000 tons of which are generated annually in the UK alone – bound with red algae to make a compostable plastic alternative that can replace single-use plastics such as bakery bags and sandwich packs.
MarinaTex claims the biopolymer creates stronger packaging than a conventional plastic bag — flying in the face of perceptions that bioplastics lack strength and durability.
Lucy Hughes, who created the product in her final year at the University of Sussex, says MarinaTex's flexibility, strength and pliability was inspired by actual fish skin and scales.
"It kind of struck me that nature can make so much from so little, so why do we need to have hundreds of man-made polymers when nature has so many already available," she told the World Economic Forum in November.
MarinaTex, which won the 2019 James Dyson Award worth €35,000, describes its product as home compostable and says it can break down within four to six weeks.
4. Plant Sugars
While PET is one of the most recyclable fossil-based plastics it takes hundreds of years to decompose. In response, Amsterdam-based Avantium has created a revolutionary "YXY" plants-to-plastics technology that converts plant-based sugars into a new biodegradable packaging material, polyethylene furanoate or PEF.
A trial of PEF biodegradability in the natural environment is showing promising signs.
"PEF degrades much faster than PET under industrial composting conditions," Caroline van Reedt Dortland, Director Communications at Avantium, told DW. Degrading in 250-400 days as opposed to 300-500 years is significant.
It is used as a textile, film, and has the potential to become a major player in the packaging of soft drinks, water, alcoholic beverages and fruit juices, having already collaborated with the likes of Carlsberg to create a "100% bio-based" beer bottle.
According to Hasso Pogrell of European Bioplastics, it's even possible to " recycle PEF together with PET, and it makes the PET recyclate perform even better than the original PET."
Gadget blog Gizmodo wrote back in 2015 about resilient and biodegradable fungal mycelia-based materials which, unlike oil-based plastic, "create no toxic byproducts."
One emerging brand utilizing fungi is Reishi, a sustainable, fine mycelium leather substitute created from a woven cellular microstructure derived from mushrooms. By emulating the collagen structure of animal leathers, Reishi fine mycelium is both sustainable and versatile.
Reishi creator MycoWorks has taken the water-resistant biomaterial to the next level, promising the performance, quality and aesthetics of leather or synthetic plastic materials, but with a negative carbon footprint.
Already utilized by a selection of European luxury and footwear brands, in late 2019 $17 million (€18 million) financing was raised to help deliver commercially viable non-plastic, non-animal Reishi materials to the market.
In terms of limiting fossil-based plastic consumption, the biomaterial aims to outperform existing "vegan leathers" that are created with unsustainable plastics.
Reposted with permission from Deutsche Welle.
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The total number of confirmed coronavirus cases passed six million Sunday, even as many countries begin to emerge from strict lockdowns.
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By Daniel Yetman
Bleach and vinegar are common household cleaners used to disinfect surfaces, cut through grime, and get rid of stains. Even though many people have both these cleaners in their homes, mixing them together is potentially dangerous and should be avoided.
Can You Mix Bleach and Vinegar?<p>Bleach can refer to any chemical that's used to get rid of stains or disinfect surfaces. The most typical form used as a cleaner is sodium hypochlorite. By itself, bleach can damage your skin but is <a href="https://www.ncbi.nlm.nih.gov/books/NBK441921/" target="_blank">non-toxic</a> when inhaled. However, it can become potentially lethal to inhale when mixed with other household cleaners.</p><p>Sodium hypochlorite is made up of a sodium, oxygen, and chlorine atoms. When this molecule is mixed with the acetic acid in vinegar or other types of acid, it releases chlorine gas. <a href="https://emergency.cdc.gov/agent/chlorine/basics/facts.asp" target="_blank">Chlorine gas</a> is extremely dangerous to human health. It's so powerful that Germany used it during World War I as a chemical weapon.</p><p>Vinegar isn't the only cleaner you need to be careful mixing with bleach. Bleach also reacts with <a href="https://www.doh.wa.gov/YouandYourFamily/HealthyHome/Contaminants/BleachMixingDangers" target="_blank">ammonia</a> to create chlorine gas. Bleach can also react to some oven cleaners, insecticides, and hydrogen peroxide.</p><p>Many household cleaners contain a chemical called <a href="https://www.acs.org/content/acs/en/pressroom/presspacs/2019/acs-presspac-october-2-2019/cleaning-with-bleach-could-create-indoor-air-pollutants.html" target="_blank">limonene</a> that gives them a citrus smell. When bleach fumes mix with limonene, they create small particles that may be damaging to both people's and animals' health. However, more research is needed to examine these particles' potential health risks.</p>
Is it Safe to Mix Them in Small Amounts?<p>According to the <a href="https://www.doh.wa.gov/YouandYourFamily/HealthyHome/Contaminants/BleachMixingDangers" target="_blank">Washington State Department of Health</a>, even low levels of chlorine gas, less than 5 parts per million (ppm), is likely to irritate your eyes, throat, and nose. It's never a good idea to mix these two cleaners together.</p><p>Unlike some other dangerous chemicals like carbon monoxide, chlorine gives off a distinctly <a href="https://www.ncbi.nlm.nih.gov/books/NBK537213/" target="_blank">pungent and irritating odor</a>. If you notice a strong smell after mixing cleaners, it's a good idea to immediately leave the area.</p><p>The <a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3136961/" target="_blank">severity of symptoms</a> you develop after breathing in chlorine gas depends on how concentrated it is, measured in parts per million (ppm), and how long you inhale it.</p><ul><li><strong>0.1 to 0.3 ppm.</strong> At this level, humans can smell the pungent odor of chlorine gas in the air.</li><li><strong>5 to 15 ppm. </strong>A concentration over 5 ppm causes irritation to the mucus membranes in your mouth and nose.</li><li><strong>Over 30 ppm.</strong> At a concentration higher than 30 ppm, chlorine gas can cause chest pain, shortness of breath, and coughing.</li><li><strong>Above 40 ppm.</strong> Concentrations higher than 40 ppm can cause potentially dangerous fluid build-up in your lungs.</li><li><strong>Above 430 ppm</strong>. Breathing in more than <a href="https://www.ncbi.nlm.nih.gov/books/NBK537213/" target="_blank">430 ppm</a> of chlorine gas can be lethal within 30 minutes.</li><li><strong>Above 1,000 ppm</strong>. Inhaling chlorine gas above this level can be deadly immediately.</li></ul>
Can You Combine Bleach and Vinegar in a Washing Machine?<p>Mixing bleach and vinegar in your washing machine is also a bad idea. Chlorine gas may be released from your washing machine when you take your clothes out. It may also leave traces of chlorine gas on your clothes.</p><p>If you use bleach in your laundry, it's a good idea to wait several loads before using vinegar.</p>
Symptoms of Exposure to a Bleach and Vinegar Reaction<p>The severity of the symptoms you'll develop after chlorine exposure depends on the amount of chlorine gas you inhale. Symptoms usually start fairly quickly. <a href="https://www.ncbi.nlm.nih.gov/books/NBK537213/" target="_blank">Most people</a> exposed to low amounts of chlorine gas recover without complications.</p><p>If your exposure to chlorine gas is relatively brief, you may notice irritation of your nose, mouth, and throat. Lung irritation may develop if you breathe in chlorine deeply.</p><p>According to the <a href="https://emergency.cdc.gov/agent/chlorine/basics/facts.asp" target="_blank">Centers for Disease Control and Prevention</a>, if you accidentally breathe in chlorine, you can experience the following:</p><ul><li><a href="https://www.healthline.com/health/eye-health/sudden-blurred-vision" target="_blank">blurry vision</a></li><li>a burning sensation in your nose, throat, or eyes</li><li><a href="https://www.healthline.com/health/cough" target="_blank">coughing</a></li><li><a href="https://www.healthline.com/health/chest-pain" target="_blank">tightness in your chest</a></li><li><a href="https://www.healthline.com/health/breathing-difficulties" target="_blank">trouble breathing</a></li><li><a href="https://www.healthline.com/health/pulmonary-edema" target="_blank">fluid in your lungs</a></li><li><a href="https://www.healthline.com/health/nausea" target="_blank">nausea</a></li><li><a href="https://www.healthline.com/health/vomiting" target="_blank">vomiting</a></li><li><a href="https://www.healthline.com/health/epiphora" target="_blank">watery eyes</a></li><li><a href="https://www.healthline.com/health/wheezing" target="_blank">wheezing</a></li></ul>
What to Do if You Get Bleach and Vinegar on Your Skin or Inhaled Chlorine Gas Vapors<p>There's <a href="https://emergency.cdc.gov/agent/chlorine/basics/facts.asp" target="_blank">no cure</a> for breathing in chlorine gas. The only treatment option is removing the chlorine from your body as quickly as possible and seeking immediate medical attention to treat your symptoms.</p><p>If you breathe in chlorine gas, you can follow these steps to help get the chlorine out of your system:</p><ul><li>Immediately go somewhere where you can breathe in fresh air.</li><li>Change and wash any clothes that may have been contaminated.</li></ul><blockquote><strong>MEDICAL EMERGENCY<br><br></strong>If your symptoms are severe, call 911 or the National Capital Poison Center (NCPC) at 800-222-1222 and follow their instructions.<br></blockquote><p>Spilling <a href="https://www.healthline.com/health/bleach-on-skin#first-aid" target="_blank">bleach</a> can cause irritation to your skin. You can take the following steps to reduce your chances of developing complications:</p><ul><li>Remove jewelry or clothes that came in contact with bleach and clean them after you wash your skin.</li><li>Rinse your skin with a sponge or an absorbent cloth over a sink.</li><li>Avoid touching other parts of your body such as your face while cleaning.</li><li>Seek immediate medical attention if you spill bleach in your eyes or if you burn your skin.</li></ul><p>Vinegar may also irritate your skin. Even though it's unlikely to cause any serious health complications, it's a good idea to wash vinegar off your skin to avoid any redness or soreness.</p>
Takeaway<p>Mixing bleach and vinegar creates potentially lethal chlorine gas. If you notice a pungent smell after mixing household cleaners, you should immediately leave the area and try to breathe in fresh air.</p><p>If you or somebody you know notice any symptoms of chlorine gas poisoning, it's a good idea to immediately call 911 or the NCPC at 800-222-1222<em>.</em></p>
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Around 500 climate activists on Saturday gathered outside the new Datteln 4 coal power plant in Germany's Ruhr region, to protest against its opening.
Climate Activists Speak Out<p>Speaking at the protest, German Fridays for Futures climate activist Luisa Neubauer said: "It's a post-factual power plant. The facts speak for themselves." She said it was a "provocation," to mark the planned coal phaseout with a new coal power plant.</p><p>"We're going to stop this power plant, we're going to bring it to a standstill, we will win this conflict," Neubauer added.</p><p>Former miners also attended the protest. "We condemn the fact that coal mining in Germany was halted and jobs were lost, only for coal now to be imported from other countries to power Datteln 4," said Sebastian Suszka, a former workers' council member.</p><p>Greta Thunberg, founder of climate activist movement Fridays for Futures tweeted that Saturday was "a shameful day for Europe.</p>
Germany's Coal Phaseout<p>Earlier this year, Germany announced a roadmap to see coal phased out, at the latest by 2038. It laid out plans for eight coal-fired power plants to be taken off the grid in 2020.</p><p>It was an important step for the largest contributor of carbon emissions in the EU — accounting for more than 22 percent of the bloc's CO2 emissions. Over a third of the electricity generated in Germany comes from burning coal.</p><p>Germany's coal commission has recommended that solutions be found for coal plants that are already built but not-yet-in-use to keep them from operating.<br></p><p>The state of North-Rhine Westphalia insisted that the additional carbon dioxide emissions from the new plant would be compensated by the closure of four other power plants.</p>
By Julia Ries
Around the world, there have been several cases of people recovering from COVID-19 only to later test positive again and appear to have another infection.
The Viral Material in Re-Positive Cases Isn’t Infectious<p>The Korean study examined 285 patients who tested positive again for the new coronavirus after they recovered from COVID-19, which had been confirmed via a negative test result.</p><p>The researchers swabbed the patients and examined the viral material to determine whether it was still actively infectious.</p><p>The team was unable to isolate live viral material, indicating that the positive diagnostic tests were picking up dead virus particles.</p><p>"[This] may speak for the fact that the virus may be dead or not be fit enough to grow — therefore the virus may not be fit enough to infect a new host," said <a href="http://www.providence.org/doctors/profile/1099717-andres-romero" target="_blank">Dr. Andres Romero</a>, an infectious disease specialist at Providence Saint John's Health Center in Santa Monica, California.</p><p>The researchers also tested 790 people who'd been in close contact with the "re-positive" patients. Of the 27 who tested positive, no cases appeared to be caused from exposure to someone who appeared to have a reinfection.</p><p>The report also found that the vast majority of recovered patients (96 percent) had neutralizing antibodies, indicating that they conferred immunity.</p><p>"Whether this is indicative of a completely protective response remains to be proven. If this study holds true, then people who have recovered can get back to work," Zapata said.</p><p>In response to the new findings, South Korea eliminated a policy requiring discharged patients to isolate for 2 weeks.</p>
Conducting and Interpreting PCR Tests<p>The tests widely used to diagnose COVID-19 are called polymerase chain reaction (PCR) tests.</p><p>The tests swab a person's nose or throat and try to pick up the virus's genetic material, or RNA.</p><p>According to <a href="https://www.cdc.gov/coronavirus/2019-ncov/hcp/faq.html" target="_blank">guidance</a> from the U.S. Centers for Disease Control and Prevention (CDC), a positive result on a PCR test doesn't "necessarily mean infectious virus is present or that the patient is contagious."</p><p>Infectious disease experts have suspected that the test kits aren't picking up actively infectious viral material in recovered patients who test positive again, but rather dead remnants of the virus.</p><p>We see this occur with other viruses, too.</p><p>"We know other viruses like parainfluenza, human metapneumovirus, or RSV [respiratory syncytial virus] may linger for months in certain patients, and that does not represent infectious state," Romero said. "Coronavirus may be the same."</p>
We Still Need to Practice Caution<p>While the findings are promising, infectious disease experts say we still need to practice caution.</p><p>More research is needed to validate these findings and determine whether they apply to distinct parts of the population, such as those who are immunocompromised.</p><p>It's common for immunocompromised patients — such as those with cancer — to continue testing positive for a virus for longer, since it takes their immune system more time to clear the virus out of their body.</p><p>"I don't think we can be 100 percent certain of whether each recovered person is no longer contagious. Again, this may differ with distinct population groups," Zapata said.</p><p>Physicians are seeing some hospitalized patients testing positive for a month after they were first swabbed for COVID-19. It's unclear whether these patients still shed infectious virus, according to Zapata.</p><p>Everyone's body mounts a distinct immune response based on their age and overall health. Different individuals will clear the virus out at different speeds, according to Zapata.</p><p>Until we have more data and a preventive vaccine, it's crucial to continue adhering to the <a href="https://www.cdc.gov/coronavirus/2019-ncov/prevent-getting-sick/prevention.html" target="_blank">safety precautions</a> laid out by the CDC.</p><p>"The reality is that moving forward, the best approach will be keeping social/physical distancing, wearing a mask, and frequent hand hygiene in order to control the spread of the virus," Romero said.</p>
The Bottom Line<p>Doctors and researchers have been unsure whether people who recover from COVID-19 who test positive again continue to be contagious, or if they could get a second infection.</p><p>New <a href="https://www.cdc.go.kr/board/board.es?mid=a30402000000&bid=0030" target="_blank">research</a> published by the Korea Centers for Disease Control and Prevention has found that recovered COVID-19 patients who test positive again aren't infectious.</p><p>The study also found that most patients who recover have neutralizing antibodies that protect them from getting sick again.</p><p>Though the study is promising, health experts say we need more data to validate the findings and determine whether they apply to all patient populations.</p>
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By Samantha Hepburn
In the expansion of its iron ore mine in Western Pilbara, Rio Tinto blasted the Juukan Gorge 1 and 2 — Aboriginal rock shelters dating back 46,000 years. These sites had deep historical and cultural significance.
The destruction of a significant Aboriginal site is not an isolated incident. Puutu Kunti Kurrama And Pinikura Aboriginal Corporation