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Climate Solutions: Technologies to Slow Climate Change
By Ajit Niranjan
It's a question that preys on our readers' minds: Can we invent our way out of climate breakdown?
But experts say there is no silver bullet to protect the climate — and that keeping fossil fuels in the ground is the surest known way to prevent further warming.
Average temperatures have risen by 1 degree Celsius since countries first industrialized and are projected to rise about 3 degrees Celsius above that baseline by the end of the century without sharp, severe cuts to CO2 emissions.
A report from the Global Carbon Project found in December that while coal-burning has largely plateaued, the rise of oil and natural gas is pushing the planet further away from its climate goals.
How can technology help governments get there? Here are four innovations that energy experts told us hold promise for slowing the march of climate change.
Solar Panels and Wind Turbines
What may be the biggest innovation to combat climate change has been around for decades.
Solar panels and wind turbines turn sun and wind into electricity without releasing greenhouse gases. As the technologies have scaled up and converted energy more efficiently, they have come down in price to become cheaper than fossil fuels globally.
"Solar and wind being cheap and reliable and performing well opens up a lot of possibilities," said Gregory Nemet, a professor at the University of Wisconsin-Madison who has written a book on how solar energy became cheap. "Even as we've had 30 years of politicians dithering and not as much progress as most people would have hoped, in the background, technology has been progressing."
But generating clean energy is one thing — storing and distributing it is another. This is particularly important for renewables that cannot generate electricity without the sun shining or wind blowing.
Three things suggest innovation is overcoming these hurdles, said Nemet. "That's renewables getting better, batteries allowing you to store electricity and then information in the system allowing you to manage it better."
Batteries for Electric Vehicles
The Royal Swedish Academy of Sciences awarded three scientists a Nobel prize in October for their work in developing lithium-ion batteries, which they say have "revolutionized our lives since they first entered the market in 1991" — and continue to advance.
Lighter and smaller than earlier rechargeable batteries, lithium batteries can also be charged faster and more often. As their weight and price continue to fall, they are playing an increasingly pivotal role in decarbonizing the transport sector by making electric vehicles cheaper.
"Battery storage will be critical," said Joao Gouveia, a senior fellow at Project Drawdown, a research organization that analyzes climate solutions. "It will allow the integration of more and more renewable tech. We cannot have 70 percent [of renewable energy by 2050] coming from wind and solar if we don't apply battery storage systems."
Holding batteries back are aging electricity grids and costs that, despite falling each year, remain high.
But electric vehicles could act as a storage system, said Gouveia, with owners buying electricity at night to charge their cars and selling it to the grid when demand is high and cars are parked, idle, during the day. "We are finding new lithium reserves because this is a tech for both markets, so we're innovating more and more."
While the global electric vehicle fleet has grown rapidly — passing 5 million cars in 2018, data from the International Energy Agency shows — this progress has been dwarfed by a rise in larger and less efficient SUVs that run on fossil fuels. Four in 10 new cars sold globally in 2018 were SUVs.
Another way to store renewable energy is using electrolyzers to extract hydrogen from water. The process, also known as power-to-X, is a way of storing energy in different forms. Engineers run an electric current through water and collect the hydrogen molecules that break off. These can be burned for heat, stored in fuel cells or turned into chemicals such as methane for processes that require fossil fuels.
"It's a great way to decarbonize the heating, mobility and chemical sector," said David Wortmann, a board member of Energy Watch Group, a German NGO. "It's scaleable — the tech is all there. The industry is young, you have manufacturers out there to produce an electrolyzer. But the demand is not there yet, the regulations are not in place."
Hydrogen could also help decarbonize a high-polluting sector that has mostly been overlooked: heavy industry.
The high heat needed to process industrial materials — such as concrete, iron, steel, and petrochemicals — is responsible for about 10 percent of global CO2 emissions, according to a report from the Center on Global Energy Policy in October. The cement industry alone is responsible for about 8 percent of CO2 emissions, mostly in production. This is more than three times the CO2 emissions of the aviation industry.
Burning hydrogen from renewable energy sources could meet industrial heating needs cleanly, said Jeff Rissmann, head of modeling at Energy Innovation, a research firm. "Moving to hydrogen can have a huge impact across many sectors, and would be one of the biggest ways to decarbonize the global economy."
Carbon Capture and Storage
Even under optimistic scenarios for reducing greenhouse gas emissions, scientists say we will not meet targets to limit global warming to 1.5 degrees Celsius without removing some of the CO2 we have already emitted. The IPCC projects between 100 billion and 1 trillion tons of CO2 would need to be removed this century.
Trees and plants that extract CO2 from the atmosphere and turn it into oxygen through photosynthesis are one way of doing this. But they take up large tracts of land — which is needed for other purposes such as growing food — and are not a secure way of storing carbon, because they may be felled for firewood or burned in forest fires.
Some companies are experimenting with capturing CO2 from power plants and storing it deep underground. By doing this with biomass plants — where recently-grown plant matter is burned and not ancient fossils — then power can be produced while reducing the amount of CO2 in the atmosphere.
But with just 19 facilities running such systems, its deployment is not happening quickly enough to meet emissions reductions targets, according to a report from the Global Carbon Capture and Storage Institute.
Reposted with permission from DW.
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EcoWatch Daily Newsletter
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
Not an Isolated Incident<p>The history of large developments destroying Indigenous heritage sites is, tragically, long.</p><p>A $2.1 billion light rail line in Sydney, completed last year, <a href="https://www.smh.com.au/national/nsw/this-is-a-tragic-loss-sydney-light-rail-construction-destroyed-heritage-site-20190322-p516qk.html" target="_blank">destroyed a site</a> of considerable significance.</p><p>More than 2,400 stone artifacts were unearthed in a small excavated area. It indicated Aboriginal people had used the area between 1788 and 1830 to manufacture tools and implements from flint brought over to Australia on British ships.</p><p>Similarly, <a href="https://www.theguardian.com/environment/2018/aug/27/the-rocks-remember-the-fight-to-protect-burrup-peninsulas-rock-art" target="_blank">ancient rock art</a> on the Burrup Peninsula in north-western Australia is under increasing threat from a gas project. The site contains more than one million rock carvings (petroglyphs) across 36,857 hectares.</p><p>This area is under the custodianship of Ngarluma people and four other traditional owners groups: the Mardudhunera, the Yaburara, the Yindjibarndi and the Wong-Goo-Tt-Oo.</p><p>But a <a href="https://www.aph.gov.au/Parliamentary_Business/Committees/Senate/Environment_and_Communications/BurrupPeninusla/Report" target="_blank">Senate inquiry</a> revealed emissions from adjacent industrial activity may significantly damage it.</p><p><span></span>The West Australian government is <a href="https://www.theguardian.com/artanddesign/2020/jan/29/australia-lodges-world-heritage-submission-for-50000-year-old-burrup-peninsula-rock-art" target="_blank">seeking world heritage listing</a> to try to increase protection, as the regulatory frameworks at the national and state level aren't strong enough. Let's explore why.</p>
What Do the Laws Say?<p>The recently renamed federal Department of Agriculture, Water and the Environment is responsible for listing new national heritage places, and regulating development actions in these areas.</p><p>At the federal level, the Environment Protection and Biodiversity Conservation Act 1999 (<a href="http://www.austlii.edu.au/cgi-bin/viewdb/au/legis/cth/consol_act/epabca1999588/" target="_blank">EPBC Act</a>) provides a legal framework for their management and protection. It is an offence to impact an area that has national heritage listing.</p><p>But many ancient Aboriginal sites have no national heritage listing. For the recently destroyed Juurkan gorge, the true archaeological significance was uncovered <em>after</em> consent had been issued and there were no provisions to reverse or amend the decision once this new information was discovered.</p><p>Where a site has no national heritage listing, and federal legislation has no application, state laws apply.</p><p>For the rock shelters in the Western Pilbara, Rio Tinto was abiding by Western Australia's <a href="http://www.austlii.edu.au/cgi-bin/viewdb/au/legis/wa/consol_act/aha1972164/" target="_blank">Aboriginal Heritage Act 1972</a> — which is now nearly 50 years old.</p>
No Consultation With Traditional Owners<p>The biggest concern with this act is there's no statutory requirement ensuring traditional owners be consulted.</p><p>This means traditional owners are left out of vital decisions regarding the management and protection of their cultural heritage. And it confers authority upon a committee that, in the words of a <a href="https://www.dplh.wa.gov.au/getmedia/11dd5b41-fcf9-4216-a1ac-06ece672c087/AH-Review-Position-Comparison-for-Aboriginal-People" target="_blank">discussion paper</a>, "lacks cultural authority."</p>
Weak in Other Jurisdictions<p>The WA Aboriginal Heritage Act 1972 is <a href="https://www.dplh.wa.gov.au/aha-review" target="_blank">under review</a>. The proposed reforms seek to abolish the committee, ensuring future decisions on Aboriginal cultural heritage give appropriate regard to the views of the traditional Aboriginal owners.</p><p><span></span>NSW is the only state with no stand-alone Aboriginal heritage legislation. However, a <a href="https://www.parliament.nsw.gov.au/researchpapers/Documents/aborigines-land-and-national-parks-in-nsw/02-97.pdf" target="_blank">similar regulatory framework</a> to WA applies in NSW under the National Parks and Wildlife Act 1974.</p><p>There, if a developer is likely to impact cultural heritage, they must apply for an Aboriginal Heritage Impact Permit. The law requires "regard" to be given to the interests of Aboriginal owners of the land, but this vague provision does not mandate consultation.</p><p>What's more, the burden of proving the significance of an Aboriginal object depends upon external statements of significance. But Aboriginal people, not others, should be responsible for determining the cultural significance of an object or area.</p><p>As in WA, the NSW regulatory framework is weak, opening up the risk for economic interests to be prioritized over damage to cultural heritage.</p>
Outdated Laws<p>The federal minister has discretion to assess whether state or territory laws are already effective.</p><p>If they decide state and territory laws are ineffective and a cultural place or object is under threat, then the federal <a href="http://www.austlii.edu.au/cgi-bin/viewdb/au/legis/cth/consol_act/aatsihpa1984549/" target="_blank">Aboriginal and Torres Strait Islander Heritage Protection Act 1984</a> can be used.</p><p>But this act is also weak. It was first implemented as an interim measure, intended to operate for two years. It has now been in operation for 36 years.</p><p>In fact, <a href="http://ymac.org.au/wp-content/uploads/2013/04/Extracts-from-Evatt-Review-of-the-Aboriginal-and-Torres-Strait-Islander-Heritage-Protection-Act-1984.pdf" target="_blank">a 1995 report</a> assessed the shortcomings of the Aboriginal and Torres Strait Islander Heritage Protection Act.</p><p>It recommended minimum standards be put in place. This included ensuring any assessment of Aboriginal cultural significance be made by a properly qualified body, with relevant experience.</p><p>It said the role of Aboriginal people should be appropriately recognized and statutorily endorsed. Whether an area or site had particular significance according to Aboriginal tradition should be regarded as a subjective issue, determined by an assessment of the degree of intensity of belief and feeling of Aboriginal people.</p><p><span></span>Twenty-five years later, this is yet to happen.</p>
By Tara Lohan
The first official tallies are in: Coronavirus-related shutdowns helped slash daily global emissions of carbon dioxide by 14 percent in April. But the drop won't last, and experts estimate that annual emissions of the greenhouse gas are likely to fall only about 7 percent this year.