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European wind farms could meet global energy demand, researchers now say
A new study estimated the untapped potential of wind energy across Europe.
- A new report calculated how much electricity Europe could generate if it built onshore wind farms on all of its exploitable land.
- The results indicated that European onshore wind farms could supply the whole world with electricity from now until 2050.
- Wind farms come with a few complications, but the researchers noted that their study was meant to highlight the untapped potential of the renewable energy source in Europe.
In 2009, the European Environment Agency made a surprising claim: If Europe were to build all of the onshore and offshore wind farms it was capable of building, wind could power the continent many times over. In fact, the 2009 report said that wind farms could provide 20 times the electricity that's estimated to be demanded in Europe in 2020.
But it turns out the actual wind potential in Europe could be much higher. A new study found that maximizing onshore wind potential could enable Europe to generate 100 times more electricity than it currently does. That's enough to cover energy demand for the entire world from now until 2050, according to the researchers.
European aspirations for a 100 percent renewable energy grid are within our collective grasp technologically...
The study, published in the September 2019 installment of Energy Policy, found that Europe's untapped wind energy potential amounts to approximately 52.5 terawatts, or about 1 million watts for every 16 European citizens. To estimate the continent's wind potential, the researchers used information detailing each nation's infrastructure, buildings and protected areas to determine which areas wouldn't be suitable for onshore wind farms.
They also conducted a spatial analysis to identify areas with sufficient wind conditions for wind farms.
Enevoldsen et al.
"The study is not a blueprint for development but a guide for policymakers indicating the potential of how much more can be done and where the prime opportunities exist," study co-author Benjamin Sovacool, professor of energy policy at the University of Sussex, told the University of Sussex Media Centre. "Our study suggests that the horizon is bright for the onshore wind sector and that European aspirations for a 100 percent renewable energy grid are within our collective grasp technologically."
The researchers admit they were "very liberal" in identifying land on which wind farms might be built; for example, they included private land where citizens might have no interest in building wind farms.
"Obviously, we are not saying that we should install turbines in all the identified sites but the study does show the huge wind power potential right across Europe which needs to be harnessed if we're to avert a climate catastrophe," Sovacool said.
Wind energy — not always a breeze
Wind energy isn't completely free of problems. As Big Think wrote in July, wind is currently one of the cheapest forms of renewable energy, but there are several factors preventing it from becoming dominant in the U.S. Those include:
- Wind variability: Put simply, wind turbines need consistent access to strong winds if they're to be efficient. That's a problem, considering some parts of the country — like the southeastern U.S. — see relatively slow wind speeds. "Wind power is very sensitive to the wind speed, more than you might guess," Paul Veers, chief engineer at the National Wind Technology Center at the National Renewable Energy Laboratory, toldVox. However, wind variability could become less of a problem if wind power could be stored more effectively.
- The window-shadow effect: When you add a wind turbine to a landscape, you change local wind patterns. One downside is that each additional turbine robs wind from other turbines in the wind farm. So, designers have been trying to space out wind turbines in a way that maximizes efficiency. But the problem with this sprawling solution is that it becomes increasingly expensive, both due to maintenance and land cost. Additionally, rural residents generally don't like having massive wind turbines spoiling their property values and views.
- Local heating: Although renewable energies like wind would curb climate change over the long term, wind turbines would likely cause local heating over the short term. Why? Cold air normally stays near the ground, while warm air flows higher. But wind turbines generally disrupt that natural order, pushing warm air down. "Any big energy system has an environmental impact," Harvard engineering and physics professor David Keith told The Associated Press. "There is no free lunch. You do wind on a scale big enough [...] it'll change things." Of course, this is a temporary effect, unlike climate change.
Still, the researchers don't think these criticisms make their findings irrelevant. In the study, they addressed the intermittent nature of wind energy, and also acknowledged the impracticality of actually building dense wind farms on every exploitable piece of land.
"To both critics the response is the same," they wrote. "Realizable wind power potential studies are not to be treated as blueprints for development. Such studies help policymakers understand what is possible as a ceiling, help planners target areas of particular attraction, and help us understand where we are in terms of state of play concerning a given technology and its potential. For onshore wind power potential, our study suggests that still the horizon is bright for this particular application in the wind energy sector and that European aspirations for a 100 percent renewable energy grid are within our collective grasp technologically."
What is human dignity? Here's a primer, told through 200 years of great essays, lectures, and novels.
- Human dignity means that each of our lives have an unimpeachable value simply because we are human, and therefore we are deserving of a baseline level of respect.
- That baseline requires more than the absence of violence, discrimination, and authoritarianism. It means giving individuals the freedom to pursue their own happiness and purpose.
- We look at incredible writings from the last 200 years that illustrate the push for human dignity in regards to slavery, equality, communism, free speech and education.
The inherent worth of all human beings<p>Human dignity is the inherent worth of each individual human being. Recognizing human dignity means respecting human beings' special value—value that sets us apart from other animals; value that is intrinsic and cannot be lost.</p> <p>Liberalism—the broad political philosophy that organizes society around liberty, justice, and equality—is rooted in the idea of human dignity. Liberalism assumes each of our lives, plans, and preferences have some unimpeachable value, not because of any objective evaluation or contribution to a greater good, but simply because they belong to a human being. We are human, and therefore deserving of a baseline level of respect. </p> <p>Because so many of us take human dignity for granted—just a fact of our humanness—it's usually only when someone's dignity is ignored or violated that we feel compelled to talk about it. </p> <p>But human dignity means more than the absence of violence, discrimination, and authoritarianism. It means giving individuals the freedom to pursue their own happiness and purpose—a freedom that can be hampered by restrictive social institutions or the tyranny of the majority. The liberal ideal of the good society is not just peaceful but also pluralistic: It is a society in which we respect others' right to think and live differently than we do.</p>
From the 19th century to today<p>With <a href="https://books.google.com/ngrams/graph?year_start=1800&year_end=2019&content=human+dignity&corpus=26&smoothing=3&direct_url=t1%3B%2Chuman%20dignity%3B%2Cc0" target="_blank" rel="noopener noreferrer">Google Books Ngram Viewer</a>, we can chart mentions of human dignity from 1800-2019.</p><img type="lazy-image" data-runner-src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yNDg0ODU0My9vcmlnaW4ucG5nIiwiZXhwaXJlc19hdCI6MTY1MTUwMzE4MX0.bu0D_0uQuyNLyJjfRESNhu7twkJ5nxu8pQtfa1w3hZs/img.png?width=980" id="7ef38" class="rm-shortcode" data-rm-shortcode-id="9974c7bef3812fcb36858f325889e3c6" data-rm-shortcode-name="rebelmouse-image" />
American novelist, writer, playwright, poet, essayist and civil rights activist James Baldwin at his home in Saint-Paul-de-Vence, southern France, on November 6, 1979.
Credit: Ralph Gatti/AFP via Getty Images
The future of dignity<p>Around the world, people are still working toward the full and equal recognition of human dignity. Every year, new speeches and writings help us understand what dignity is—not only what it looks like when dignity is violated but also what it looks like when dignity is honored. In his posthumous essay, Congressman Lewis wrote, "When historians pick up their pens to write the story of the 21st century, let them say that it was your generation who laid down the heavy burdens of hate at last and that peace finally triumphed over violence, aggression and war."</p> <p>The more we talk about human dignity, the better we understand it. And the sooner we can make progress toward a shared vision of peace, freedom, and mutual respect for all. </p>
Scientists find that bursts of gamma rays may exceed the speed of light and cause time-reversibility.
- Astrophysicists propose that gamma-ray bursts may exceed the speed of light.
- The superluminal jets may also be responsible for time-reversibility.
- The finding doesn't go against Einstein's theory because this effect happens in the jet medium not a vacuum.
Jet bursting out of a blazar. Black-hole-powered galaxies called blazars are the most common sources detected by NASA's Fermi Gamma-ray Space Telescope.
Cosmic death beams: Understanding gamma ray bursts<div class="rm-shortcode" data-media_id="cu2knVEk" data-player_id="FvQKszTI" data-rm-shortcode-id="c6cfd20fdf31c82cb206ade8ce21ba3f"> <div id="botr_cu2knVEk_FvQKszTI_div" class="jwplayer-media" data-jwplayer-video-src="https://content.jwplatform.com/players/cu2knVEk-FvQKszTI.js"> <img src="https://cdn.jwplayer.com/thumbs/cu2knVEk-1920.jpg" class="jwplayer-media-preview" /> </div> <script src="https://content.jwplatform.com/players/cu2knVEk-FvQKszTI.js"></script> </div>
Is Bitcoin akin to 'digital gold'?
- In October, PayPal announced that it would begin allowing users to buy, sell, and hold cryptocurrencies.
- Other major fintech companies—Square, Fidelity, SoFi—have also recently begun investing heavily in cryptocurrencies.
- While prices are volatile, many investors believe cryptocurrencies are a relatively safe bet because blockchain technology will prove itself over the long term.
Presentation slide from Sanja Kon's presentation on the evolution of money at 2020 Web Summit
Credit: Sanja Kon<p>The move came shortly after the payments company Square invested $50 million into Bitcoin, and after Fidelity announced that it was opening a Bitcoin fund into which qualified purchasers could invest <a href="https://www.bloomberg.com/news/articles/2020-08-26/fidelity-launches-inaugural-bitcoin-fund-for-wealthy-investors" target="_blank">(minimum investment: $100,000)</a>. Together, this institutional backing might have something to do with Bitcoin's recent surge back to near its 2017 price peak of $19,783. (Bitcoin is listed at 19,384.30 as of Dec. 3.)<br></p>
Presentation slide from Sanja Kon's presentation on the evolution of money at 2020 Web Summit
Credit: Sanja Kon<p>But more importantly, it suggests cryptocurrencies might soon have the opportunity to prove themselves in real-world use cases. After all, skeptics have long doubted the ability of cryptocurrencies to go mainstream as a form of everyday payment. But people seem increasingly comfortable with digital payment systems.</p><p style="margin-left: 20px;">"The entire world is going to come into digital first," Schulman said at Web Summit, adding that PayPal's services already go hand-in-hand with cryptocurrencies. "As we thought about it, digital wallets are a natural complement to digital currencies. We've got over 360 million digital wallets and we need to embrace cryptocurrencies."</p><p>Sanja Kon, vice president of global partnerships at the cryptocurrency payments processor company UTRUST, also spoke at Web Summit about the increasing adoption of digital payments:</p><p style="margin-left: 20px;">"Physical cash is becoming more and more obsolete. And the next step in the evolution is digital currency."</p><p>Kon noted some of the inherent advantages of cryptocurrencies, namely ownership. </p><p style="margin-left: 20px;">"For many people, this is really the main benefit of cryptocurrency: Users owning cryptocurrencies are able to control how they spend their money without dealing with any intermediary authority like a bank or a government, for example," Kon said, adding that there are no bank fees associated with cryptocurrencies, and that international transaction fees are significantly lower than wire transfers of fiat currency.</p><p>Kon said cryptocurrencies have unique growth opportunities in areas where people aren't integrated into modern banking systems:</p><p style="margin-left: 20px;">"With cryptocurrencies and blockchain, with the use of just a smartphone and access to internet, Bitcoin and cryptocurrencies can be available to populations of people and users without access to the traditional banking system."</p>
Bitcoin as 'digital gold'<p>Still, it could take years for people to start using cryptocurrencies for everyday purchases on a large scale. Despite this, many cryptocurrency advocates see digital currencies, particularly Bitcoin, as a way to store value—digital gold, essentially.</p><p style="margin-left: 20px;">"I don't think Bitcoin is going to be used as a transactional currency anytime in the next five years," billionaire investor Mike Novogratz recently told <a href="https://www.bloomberg.com/news/articles/2020-10-23/novogratz-says-bitcoin-is-digital-gold-not-a-currency-for-now?srnd=markets-vp" target="_blank">Bloomberg</a>. "Bitcoin is being used as a store of value. [...] "Bitcoin as a gold, as digital gold, is just going to keep going higher. More and more people are going to want it as some portion of their portfolio."</p><p>There are obvious parallels between gold and Bitcoin: Both are mined, do not degrade over time, are finite in supply, and aren't directly tied to the value of fiat currency, making them <a href="https://www.reuters.com/article/us-gold-inflation/gold-as-an-inflation-hedge-well-sort-of-idUSKCN1GD516" target="_blank" rel="noopener noreferrer">relatively invulnerable to inflation</a>. The obvious objection is that the price of Bitcoin, and cryptocurrencies in general, is far more volatile than gold.</p><p>But for investors who believe the inherent value of cryptocurrency technology will prove itself over the long term, these price fluctuations are just bumps on the long road to the future of currency. </p><p style="margin-left: 20px;">"It's no longer a debate if crypto is a thing, if Bitcoin is an asset, if the blockchain is going to be part of the financial infrastructure," Novogratz said. "It's not if, it's when, and so every single company has to have a plan now."</p>
A new study finds that some people just want privacy.
- Despite its reputation as a tool for criminals, only a small percentage of Tor users were actually going to the dark web.
- The rate was higher in free countries and lower in countries with censored internet access.
- The findings are controversial, and may be limited by their methodology to be general assumptions.