from the world's big
Top 6 ways to suck greenhouse gases out of the atmosphere
Researchers evaluated the best and worst ways to remove greenhouse gases from the atmosphere in a recent report.
- A recent report from International Institute for Applied Systems Science evaluated six land-based methods for removing greenhouse gases from the atmosphere.
- Though they concluded that every technique would be a net positive for the world, some were riskier or costlier than others.
- Among the safest, cheapest, and overall best approaches were restoring the wetlands and soil carbon sequestration.
In 2016, the Paris Climate Agreement set out the ambitious goal of limiting the rise in global temperature to below 2°C above its preindustrial levels, preferably to 1.5°C. These numbers might seem small, but the amount of energy needed to transform the entire world's average temperature is tremendous, and so too are its effects. If, for instance, the global temperature blasts past that 2°C mark and reaches 4°C, then nearly all of the U.S. will turn into an uninhabitable desert.
But focusing too much on the doom-and-gloom that climate change discussions so often revolve around can be pretty exhausting. So, let's focus instead on possible solutions. If we're to stay below 2°C, we'll need to deploy a multifaceted strategy. Part of that has to be finding ways to remove the greenhouse gases already in our atmosphere.
Recently, researchers at the International Institute for Applied Systems Science looked at the top six land-based methods for sucking greenhouse gases out of the atmosphere to evaluate their costs, their benefits, and which might be our best options going forward. While some of them are more risky or higher cost than others, all of them were found to contribute in some way and to effectively remove greenhouse gases from out of atmosphere.
1. Afforestation and reforestation
Between 1990 and 2015, the world lost 290 million hectares of forest. Restoring these depleted reserves (reforestation) and planting in previously un-forested areas (afforestation) is a fairly simple, common-sense approach to fighting climate change. Trees suck CO2 out of the air and store it in their timber — not only that, but they also contribute to food production, help to regulate freshwater, offer habitats to animals, and provide jobs and recreation among other benefits.
On the other hand, afforestation and reforestation require a lot of water usage and take up land that could otherwise be used for farming. Despite this, the researchers estimated that this strategy could remove between 0.5 to 7 gigatons (that's a billion tons) of CO2 from the atmosphere. To put that into context, one estimate provided by Carbon Brief suggests that human beings have released 1,374 gigatons of CO2 into the atmosphere since the Industrial Revolution. We don't have to get rid of all of this extra CO2, fortunately; just enough to keep warming within acceptable bounds.
2. Wetland restoration
Wetlands might seem like an odd candidate for being one of the most beneficial features of the planet, but they have the potential to scrub another 2.7 gigatons of CO2 from the air. In fact, although wetlands cover 9 percent of the planet, they're estimated to deliver 23 percent of the total value offered by the globe's ecosystems.
For instance, wetlands are the best regulators of water resources out there—they're even sometimes intentionally developed near sewage plants to help filter out pollutants. They also provide habitats for keystone species, can help to produce certain crops (e.g., rice or cranberries), and are extremely resilient to rising sea levels.
Although they tend to release some methane, the amount of CO2 they suck up is well worth it. Regrettably, however, half of the globe's wetlands have been lost, making their restoration a top priority. In addition to being a cheap venture, the researchers also identified virtually no downsides to restoring wetlands.
3. Soil carbon sequestration
Like wetland restoration, soil carbon sequestration — storing carbon in the soil over the long term — presents few downsides. This can take place through a variety of mechanisms, the biggest one being the photosynthesis of plants. But smart crop management, like rotating crops, planting perennial crops (those that don't need to be replanted every year), and so on, can increase how much carbon is stored in the soil. So too can optimizing fertilizer usage, tilling less intensely, improving water management, and many other techniques. Implementing these techniques could result in a reduction of between 2 and 5 gigatons of CO2.
By farming with the conscious goal of sequestering more carbon in the soil, we also gain the benefit of having more useful soil for use in building materials, pharmaceuticals, electronics, and other industrial applications. Plus, it helps to prevent erosion, preserves the landscape, and increases crop yields.
Flickr user Oregon Department of Forestry
Biochar is the result of biomass pyrolysis; simply put, it's charcoal. When biomass is burned in a low- or no-oxygen environment, it becomes carbonized, locking that carbon into the material and preventing its transference to the atmosphere. Biochar stores carbon in a long-term, durable fashion. Typically, biochar is distributed in soil, where it can help improve food production and balance the pH of acidic soil. Microorganisms in soils also emit nitrous oxide, another greenhouse gas, but adding small amounts of biochar significantly reduces these emissions, along with other greenhouse gases other than CO2. Plus, producing biochar can also generate electricity.
However, biochar production has to be done carefully. If produced without following clean guidelines, biochar can actually release more greenhouse gases into the atmosphere. But if done correctly, producing biochar could reduce greenhouse gases by up to 2 gigatons of CO2 a year.
5. Terrestrial enhanced weathering
A considerable amount of chemistry is slowly but consistently being conducted beneath our feet. In particular, weathering plays an important role in soil chemistry. As the soil's minerals break down over time, they release nutrients and form secondary minerals, like clay. We can improve this process and encourage desirable soil chemistry by adding crushed silicate rocks rich in calcium and magnesium and low in metal ions like nickel or chromium. Basalt, for instance, would be a good candidate.
Doing so could reduce soil acidity and encourage the transformation of CO2 into bicarbonate ions, or HCO3-. As an added benefit, run-off HCO3- could increase ocean alkalinity, making the ocean more resistant to pH changes. Although it would have some positive effect, the researchers noted that field-scale assessments of this technique's interactions with other approaches — like reforestation — would be necessary to determine exactly how much terrestrial enhanced weathering could contribute to reducing greenhouse gas emissions.
6. Bioenergy carbon capture and storage (BECCS)
An engineer walks through the Bailey Bioenergy Facility in Washington, D.C.
Katherine Frey/The Washington Post via Getty Images
The use of BECCS is something of a one-two punch; it provides energy, avoiding the need to use fossil fuels, and as feedstocks grow for later use as fuel, they suck CO2 out of the atmosphere. Plants like switchgrass or giant reedgrass make for excellent BECCS feedstocks.
Generally, regular bioenergy is a carbon-zero product, since the fuel sequesters CO2 as it grows and releases CO2 as it's burned for energy. But incorporating carbon capture and storage (CCS) technology in this process results in negative emissions. This beats adding CCS technology to fossil fuel processes, since burning fossil fuels starts off by adding emissions to the atmosphere — existing CCS tech can therefore only reduce fossil fuel emissions, rather than turning them negative as is the case with bioenergy.
If BECCS were implemented at a large scale by the year 2100, it could remove 15 gigatons of CO2 per year. However, doing so would be expensive, and the land taken up to grow bioenergy feedstocks could be used instead to grow food. It would also require a greater use of fertilizers and would require a good amount of water to grow.
With the exception of wetland restoration and soil carbon sequestration, all of these approaches for greenhouse gas removal present some kind of downside that we would need to mitigate. The most challenging approaches would be afforestation/reforestation, BECCS, and biochar production, primarily due to their use of land that could otherwise grow food and their water requirements.
However, the researchers found that all of these methods for greenhouse gas removal would not only reduce greenhouse gases in the atmosphere, but, on balance, they would also make our lives better, either by creating jobs, reducing pollution, contributing food, promoting ecological diversity, or other ancillary benefits. Combating climate change is often presented as a costly venture, but in reality, it's more of an investment. By assessing the costs and benefits of approaches such as these six, we can get a better picture of what our return will be.
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Emotional intelligence is a skill sought by many employers. Here's how to raise yours.
- Daniel Goleman's 1995 book Emotional Intelligence catapulted the term into widespread use in the business world.
- One study found that EQ (emotional intelligence) is the top predictor of performance and accounts for 58% of success across all job types.
- EQ has been found to increase annual pay by around $29,000 and be present in 90% of top performers.
Researchers hope the technology will further our understanding of the brain, but lawmakers may not be ready for the ethical challenges.
- Researchers at the Yale School of Medicine successfully restored some functions to pig brains that had been dead for hours.
- They hope the technology will advance our understanding of the brain, potentially developing new treatments for debilitating diseases and disorders.
- The research raises many ethical questions and puts to the test our current understanding of death.
What's dead may never die, it seems<p>The researchers did not hail from House Greyjoy — "What is dead may never die" — but came largely from the Yale School of Medicine. They connected 32 pig brains to a system called Brain<em>Ex</em>. Brain<em>Ex </em>is an artificial perfusion system — that is, a system that takes over the functions normally regulated by the organ. The pigs had been killed four hours earlier at a U.S. Department of Agriculture slaughterhouse; their brains completely removed from the skulls.</p><p>Brain<em>Ex</em> pumped an experiment solution into the brain that essentially mimic blood flow. It brought oxygen and nutrients to the tissues, giving brain cells the resources to begin many normal functions. The cells began consuming and metabolizing sugars. The brains' immune systems kicked in. Neuron samples could carry an electrical signal. Some brain cells even responded to drugs.</p><p>The researchers have managed to keep some brains alive for up to 36 hours, and currently do not know if Brain<em>Ex</em> can have sustained the brains longer. "It is conceivable we are just preventing the inevitable, and the brain won't be able to recover," said Nenad Sestan, Yale neuroscientist and the lead researcher.</p><p>As a control, other brains received either a fake solution or no solution at all. None revived brain activity and deteriorated as normal.</p><p>The researchers hope the technology can enhance our ability to study the brain and its cellular functions. One of the main avenues of such studies would be brain disorders and diseases. This could point the way to developing new of treatments for the likes of brain injuries, Alzheimer's, Huntington's, and neurodegenerative conditions.</p><p>"This is an extraordinary and very promising breakthrough for neuroscience. It immediately offers a much better model for studying the human brain, which is extraordinarily important, given the vast amount of human suffering from diseases of the mind [and] brain," Nita Farahany, the bioethicists at the Duke University School of Law who wrote the study's commentary, told <em><a href="https://www.nationalgeographic.com/science/2019/04/pig-brains-partially-revived-what-it-means-for-medicine-death-ethics/" target="_blank">National Geographic</a>.</em></p>
An ethical gray matter<p>Before anyone gets an <em>Island of Dr. Moreau</em> vibe, it's worth noting that the brains did not approach neural activity anywhere near consciousness.</p><p>The Brain<em>Ex</em> solution contained chemicals that prevented neurons from firing. To be extra cautious, the researchers also monitored the brains for any such activity and were prepared to administer an anesthetic should they have seen signs of consciousness. </p><p>Even so, the research signals a massive debate to come regarding medical ethics and our definition of death. </p><p>Most countries define death, clinically speaking, as the irreversible loss of brain or circulatory function. This definition was already at odds with some folk- and value-centric understandings, but where do we go if it becomes possible to reverse clinical death with artificial perfusion?</p><p>"This is wild," Jonathan Moreno, a bioethicist at the University of Pennsylvania, told <a href="https://www.nytimes.com/2019/04/17/science/brain-dead-pigs.html" target="_blank">the <em>New York Times</em></a>. "If ever there was an issue that merited big public deliberation on the ethics of science and medicine, this is one."</p><p>One possible consequence involves organ donations. Some European countries require emergency responders to use a process that preserves organs when they cannot resuscitate a person. They continue to pump blood throughout the body, but use a "thoracic aortic occlusion balloon" to prevent that blood from reaching the brain.</p><p>The system is already controversial because it raises concerns about what caused the patient's death. But what happens when brain death becomes readily reversible? Stuart Younger, a bioethicist at Case Western Reserve University, <a href="https://www.nature.com/articles/d41586-019-01216-4#ref-CR2" target="_blank">told <em>Nature</em></a> that if Brain<em>Ex</em> were to become widely available, it could shrink the pool of eligible donors.</p><p>"There's a potential conflict here between the interests of potential donors — who might not even be donors — and people who are waiting for organs," he said.</p><p>It will be a while before such experiments go anywhere near human subjects. A more immediate ethical question relates to how such experiments harm animal subjects.</p><p>Ethical review boards evaluate research protocols and can reject any that causes undue pain, suffering, or distress. Since dead animals feel no pain, suffer no trauma, they are typically approved as subjects. But how do such boards make a judgement regarding the suffering of a "cellularly active" brain? <a href="https://bigthink.com/philip-perry/after-death-youre-aware-that-youve-died-scientists-claim" target="_blank">The distress of a partially alive brain</a>? </p><p>The dilemma is unprecedented.</p>
Setting new boundaries<p>Another science fiction story that comes to mind when discussing this story is, of course, <em>Frankenstein</em>. As Farahany told <em>National Geographic</em>: "It is definitely has [sic] a good science-fiction element to it, and it is restoring cellular function where we previously thought impossible. But to have <em>Frankenstein</em>, you need some degree of consciousness, some 'there' there. [The researchers] did not recover any form of consciousness in this study, and it is still unclear if we ever could. But we are one step closer to that possibility."</p><p>She's right. The researchers undertook their research for the betterment of humanity, and we may one day reap some unimaginable medical benefits from it. The ethical questions, however, remain as unsettling as the stories they remind us of.</p>
A 71% wet Mars would have two major land masses and one giant 'Medimartian Sea.'
- Sci-fi visions of Mars have changed over time, in step with humanity's own obsessions.
- Once the source of alien invaders, the Red Planet is now deemed ripe for terraforming.
- Here's an extreme example: Mars with exactly as much surface water as Earth.
Misogynists in space<img type="lazy-image" data-runner-src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yMzU1ODkzMS9vcmlnaW4uanBnIiwiZXhwaXJlc19hdCI6MTYyNDEzMzY4OX0.XEEPJJnp75idUXzutmJ5ZGo35WYKxmVEyIiSwDpMeE4/img.jpg?width=980" id="6c715" class="rm-shortcode" data-rm-shortcode-id="2210c6d8590f7886eb6e4a89bcd6a50e" data-rm-shortcode-name="rebelmouse-image" alt="\u200bMars \u2013 and Martians \u2013 were a staple of 1930s pulp science fiction." />
Mars – and Martians – were a staple of 1930s pulp science fiction.
Image: ScienceBlogs.de - CC BY-SA 2.0<p><em>"Oh, my God, it's a woman," he said in a tone of devastating disgust. </em></p><p><em></em>"Stowaway to Mars" hasn't aged well. First serialised in 1936 as "Planet Plane" and set in the then distant future of 1981, the fourth novel by sci-fi legend John Wyndham (writing as John Benyon) could have been remembered mainly for its charming retro-futurism, if it weren't so blatantly, offhandedly misogynistic. </p><p>Fortunately, each era's sci-fi says more about itself than about the future. That also goes for how we see Mars. 'Classic' Martians, like the ones in H.G. Wells' "War of the Worlds," are creatures from a dying planet, using their superior firepower to invade Earth and escape their doom. That trope reflected 19th- and 20th-century fears about mechanized total warfare, which hung like a sword of Damocles over otherwise increasingly placid lifestyles. </p><p>Closer inspection of the Red Planet has revealed the absence of green men; and now <em>we're </em>the dying planet – pardon my Swedish. So the focus has shifted from interplanetary war to terraforming the fourth rock from the Sun, creating something all those protest signs say we don't have: a Planet B. <span></span></p>
How to keep Mars from killing us<img type="lazy-image" data-runner-src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yMzU1ODkzNC9vcmlnaW4uanBnIiwiZXhwaXJlc19hdCI6MTYzOTgyNTcwNX0.V7I3VFPch0oV8YDx95ZLLZFY7zEcyqSiG5uCAiMu2hg/img.jpg?width=980" id="f092e" class="rm-shortcode" data-rm-shortcode-id="5ca3b60a81a5f003a3e1ef467cf95f1a" data-rm-shortcode-name="rebelmouse-image" alt="Map of the surface of the planet Mars, showing the ice caps at the poles." />
Mars today: red and dusty, dead and deadly.
Image: NASA - public domain.<p>Cue Elon Musk, who doesn't just build Teslas but also heads SpaceX, a program to make humanity an interplanetary species by landing the first humans on Mars by 2024 as the pioneers of a permanent, self-sufficient and growing colony.</p><p><span></span>Such a colony would benefit from an environment that doesn't try to kill you if you take off your space helmet. Martian temperatures average at around -55°C (-70°F), and its atmosphere has just 1 percent the volume of Earth's, in a mix that contains far less oxygen. Changing all that to an ecosystem that's more like our own, would be a herculean task. </p>
From Red Mars to Green Mars<img type="lazy-image" data-runner-src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yMzU1ODk0NC9vcmlnaW4uanBnIiwiZXhwaXJlc19hdCI6MTYxNTE0NjA5N30.iloUVThQOBjnkP7HuLefzPlOeIDE8wOlfcXMQ7ZYDMw/img.jpg?width=980" id="f9ad2" class="rm-shortcode" data-rm-shortcode-id="05032082590ebcf98a6830576ae3815e" data-rm-shortcode-name="rebelmouse-image" alt="\u200bBefore and after images of a terraformed Mars" />
Before and after images of a terraformed Mars in the lobby of SpaceX offices in Hawthorne, California.
Image: Steve Jurvetson / Flickr - CC BY 2.0<p>So how would Musk go about it? In August 2019, he launched a t-shirt with the two-word answer: 'Nuke Mars'. The idea would be to heat up and release the carbon dioxide frozen at Mars's poles, creating a much warmer and wetter planet – as Mars may have been about 4 billion years ago – though still not with a breathable atmosphere.</p><p>Alternatives to nuclear explosions: photosynthetic organisms on the ground or giant mirrors in space, either of which could also melt the Martian poles. However, many scientists question the logistics of these plans, and even whether there is enough readily accessible CO2 on Mars to fuel the climate change that Musk (and others) envision. </p><p>Ah, but why stop at the objections of the current scientific consensus? Sometimes, you have to dream ahead to see the place that can't be built yet. In the lobby of SpaceX HQ in Hawthorne, California, Red Mars and Green Mars are shown side by side. The terraformed version on the right looks green and cloudy and blue – Earth-like, or at least habitable-looking.<span></span></p>
Or how about a Blue Mars?<img type="lazy-image" data-runner-src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yMzU1ODk1MS9vcmlnaW4ucG5nIiwiZXhwaXJlc19hdCI6MTYwNTkwNjU4OX0.sdccROyaHpYcw9C8E-4iICzMA_GNXsZXzL1XGcqDink/img.png?width=980" id="1ba6e" class="rm-shortcode" data-rm-shortcode-id="b3325bff53cb4b13cf77bff877961338" data-rm-shortcode-name="rebelmouse-image" alt="wet Mars map" />
A map of Mr Bhattarai's wet Mars, in the Robinson projection.
Image: A.R. Bhattarai, reproduced with kind permission; modified with MaptoGlobe<p>But why stop there? This map looks forward to a Mars that doesn't just have some surface water, but exactly as much as Earth – which means quite a lot. No less than 71 percent of our planet's surface is covered by oceans, seas, and lakes. The dry bits are our continents and islands. </p><p><span></span>In the case of Mars, a 71 percent wet planet leaves the planet's northern hemisphere mainly ocean, with most of the dry land located in the southern half. </p><p><span></span>Most of the dry land is connected via the south pole but is articulated in two distinct land masses. Both semi-continents are separated by a wide bay that corresponds to Argyre Planitia. </p><p><span></span>The one in the west is centered on Tharsis, a vast volcanic tableland. To the north, attached to the main land mass, is Alba Mons, the largest volcano on Mars in terms of area (with a span comparable to that of the continental United States). </p><p><span></span>It's about 6.8 km (22,000 ft) high, which is about one-third of Olympus Mons, a volcano now located on its own island off the northwest coast of Tharsis. At a height of over 21 km (72,000 ft), Olympus Mons is the highest volcano on Mars and the tallest planetary mountain (1) currently known on the solar system. Olympus rises about 20 km (66,000 ft) above the sea level as shown on this map.</p>
A new civilization<img type="lazy-image" data-runner-src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yMzU1ODk1Ni9vcmlnaW4uZ2lmIiwiZXhwaXJlc19hdCI6MTYyMDEwNzQ0Nn0.vKa0nNqKdMTfWYG6behUPPg9giToq3Lx6CsWQ70eqCE/img.gif?width=980" id="7f62c" class="rm-shortcode" data-rm-shortcode-id="bcffffaf301663a42758cf4cb8e11a76" data-rm-shortcode-name="rebelmouse-image" alt="\u200bSpinning globe view of Mr Bhattarai's wet Mars." />
Spinning globe view of Mr Bhattarai's wet Mars.
Image: A.R. Bhattarai, reproduced with kind permission; modified with MaptoGlobe<p>Mars's eastern continent is centered not on a plateau, but on a depression that on today's 'dry' Mars is called Hellas Planitia, one of the largest impact craters in the Solar system. On the 'wet' Mars of this map, the crater is the central and largest part of a sea that is surrounded by land, a Martian version of the Mediterranean Sea. Perhaps one day this Medimartian Sea will be the Mare Nostrum of a new civilization. </p><p>To the northeast of the circular semi-continent is a large island that on 'our' Mars is Elysium Mons, a volcano that is the planet's third-tallest mountain (14.1 km, 46,000 ft).</p><p>The map is the work of Aaditya Raj Bhattarai, a civil engineering student at Tribhuvan University in Kathmandu (Nepal). Talking to <a href="https://www.inverse.com/innovation/mars-with-water-map" target="_blank" rel="dofollow">Inverse</a>, he said he hoped his map could help further the Martian plans of Elon Musk and SpaceX: "This is part of my side project where I calculate the volume of water required to make life on Mars sustainable and the sources required for those water volumes from comets that will come nearby Mars in the next 100 years."<br></p><p><br></p><p><strong></strong><em>Images by Mr Bhattarai reproduced with kind permission. Check out <a href="https://aadityabhattarai.com.np/" target="_blank">his website</a>. </em><em>Planetary projection and spinning globe created via <a href="https://www.maptoglobe.com/" target="_blank">MaptoGlobe</a>.</em></p><p><strong>Strange Maps #1043</strong></p><p><em>Got a strange map? Let me know at </em><a href="mailto:email@example.com">firstname.lastname@example.org</a><em>.</em></p><p>________<br>(1) The tallest mountain in the Solar system, planetary or otherwise, we know of today, is a peak which rises 22.5 km (14 mi) from the center of the Rheasilvia crater on Vesta, a giant asteroid which makes up 9 percent of the entire mass of the asteroid belt. <br></p>
Starting and running a business takes more than a good idea and the desire to not have a boss.
- Anyone can start a business and be an entrepreneur, but the reality is that most businesses will fail. Building something successful from the ground up takes hard work, passion, intelligence, and a network of people who are equally as smart and passionate as you are. It also requires the ability to accept and learn from your failures.
- In this video, entrepreneurs in various industries including 3D printing, fashion, hygiene, capital investments, aerospace, and biotechnology share what they've learned over the years about relationships, setting and attaining goals, growth, and what happens when things don't go according to plan.
- "People who start businesses for the exit, most of them will fail because there's just no true passion behind it," says Miki Agrawal, co-founder of THINX and TUSHY. A key point of Agrawal's advice is that if you can't see yourself in something for 10 years, you shouldn't do it.
After a decade of failed attempts, scientists successfully bounced photons off of a reflector aboard the Lunar Reconnaissance Orbiter, some 240,000 miles from Earth.