Solar-powered desalination plant in Kenya gives fresh water to 25,000 people a day
Turning salt water into fresh water with the power of the sun.
- New solar-powered desalination plant provides fresh water in Kenya.
- The plant is already able to support 25,000 people a day.
- As more water-scarce regions pop up worldwide, technology such as this offers an energy efficient way to provide fresh water.
We are only at the beginning of an increasingly more perilous worldwide water crisis. The ability to turn seawater into drinking water will be able to turn the tides on this problem before it grows.
Desalination on an industrial scale would change the world.
We may be witnessing the first instances of a viable and scalable desalination effort. At a newly constructed solar-powered desalination plant in Kenya, a nonprofit called GivePower has been able to provide fresh water to thousands. The desalination plant opened up on the coasts of Kiunga in July 2018, and today it's capable of creating 19,800 gallons (75,000 liters) of drinking water each day. That's able to support around 25,000 people.
Hayes Barnard, the founder and president of GivePower, is taking his experience from the solar field and applying it to fresh water source crises.
"Humanity needs to take swift action to address the increasingly severe global water crisis that faces the developing world," he says. "With our background in off-grid clean energy, GivePower can immediately help by deploying solar water farm solutions to save lives in areas throughout the world that suffer from prolonged water scarcity."
GivePower’s solar power desalination device
GivePower started off in 2013 as a nonprofit branch of SolarCity, Elon Musk's failed solar-panel company that was eventually absorbed into Tesla in 2016. Barnard spun off GivePower into its own organization before the merger.
He spent almost two years in San Francisco building the machine, he hopes the technology could one day reach the more than two billion people who live in water-scarce areas. The nonprofit works mostly on building solar-energy power plants that provide electricity all across the developing world.
According to GivePower, they've "already deployed more than 2,650 solar-powered energy systems to schools, medical clinics and villages in 17 developing countries GivePower is focusing its efforts on the most critical use case of sustainable energy: reliable access to clean water."
The Kiunga facility initially cost $500,000 to build and took one month to construct. They hope to generate $100,000 per year from the plant, and then funnel that money into building new facilities. The eventual goal is to cut costs to $100,00 per solar-powered desalination plant in the future. Barnard hopes that the systems will fund each other to create an additional system every five years.
Part of their initial funding came from a $250,000 grant by Bank of America last year.
Access to the system comes from people using the M-Pesa payments app. Locals only have to pay a fourth of a cent for every liter of water. Barnard points out that this is astronomically less than what is usually $1 per liter from premium water brands.
The installation in Kiunga has already made a lot of headway and fundamental change for the people living there.
Fresh water crisis and women’s rights
It's estimated by UNICEF and the World Health Organization (WHO) that one third of the world's population don't have access to safe drinking water. By 2025, half of the world's population may live in water-scarce regions. Cities in Africa, China, and India are already facing this problem.
It's been found that limited access to fresh drinking water keeps women out of the educational system. According to a report by the UN Commission for Human Rights, women and children in Africa and Asia must walk an average of 3.7 miles a day to procure water.
The UN states that "between 50 and 100 litres of water per person per day are needed to ensure that most basic needs are met and few health concerns arise."
This is why Barnard thinks that it's so crucial to bring water directly to them. The ongoing climate crisis will only make these types of solutions more crucial for affected communities .
GivePower hopes to establish a local thriving community around these new fresh water sources. One that'll encourage health, safety and even commerce. Already, Barnard has seen a group of women that have started a freshwater clothes washing service. It's his hope and intention that this spurs economic activity for women and affects the community at large.
The ingenious technology of solar powered desalination may just be the panacea for the growing water crisis. Once basic human needs are met, these water-scarce regions would not only survive but eventually flourish.
What would happen if you tripled the US population? Join Matthew Yglesias and Charles Duhigg at 1pm ET on Monday, September 28.
The idea of 'absolute time' is an illusion. Physics and subjective experience reveal why.
- Since Einstein posited his theory of general relativity, we've understood that gravity has the power to warp space and time.
- This "time dilation" effect occurs even at small levels.
- Outside of physics, we experience distortions in how we perceive time — sometimes to a startling extent.
Physics without time<p>In his book "The Order of Time," Italian theoretical physicist Carlo Rovelli suggests that our perception of time — our sense that time is forever flowing forward — could be a highly subjective projection. After all, when you look at reality on the smallest scale (using equations of quantum gravity, at least), time vanishes.</p><p style="margin-left: 20px;">"If I observe the microscopic state of things," writes Rovelli, "then the difference between past and future vanishes … in the elementary grammar of things, there is no distinction between 'cause' and 'effect.'"</p><p>So, why do we perceive time as flowing <em>forward</em>? Rovelli notes that, although time disappears on extremely small scales, we still obviously perceive events occur sequentially in reality. In other words, we observe entropy: Order changing into disorder; an egg cracking and getting scrambled.</p><p>Rovelli says key aspects of time are described by the second law of thermodynamics, which states that heat always passes from hot to cold. This is a one-way street. For example, an ice cube melts into a hot cup of tea, never the reverse. Rovelli suggests a similar phenomenon might explain why we're only able to perceive the past and not the future.</p><p style="margin-left: 20px;">"Any time the future is definitely distinguishable from the past, there is something like heat involved," Rovelli wrote for the <a href="https://www.ft.com/content/ce6ef7b8-429a-11e8-93cf-67ac3a6482fd" target="_blank"><em>Financial Times</em></a>. "Thermodynamics traces the direction of time to something called the 'low entropy of the past', a still mysterious phenomenon on which discussions rage."</p>
The strange subjectivity of time<p>Time moves differently atop a mountain than it does on a beach. But you don't need to travel any distance at all to experience strange distortions in your perception of time. In moments of life-or-death fear, for example, your brain would release large amounts of adrenaline, which would speed up your internal clock, causing you to perceive the outside world as moving slowly.<br></p><p>Another common distortion occurs when we focus our attention in particular ways.</p><p style="margin-left: 20px;">"If you're thinking about how time is <em>currently</em> passing by, the biggest factor influencing your time perception is attention," Aaron Sackett, associate professor of marketing at the University of St. Thomas, told <em><a href="https://gizmodo.com/why-does-time-slow-down-and-speed-up-1840133782" target="_blank">Gizmodo</a></em>.<em> "</em>The more attention you give to the passage of time, the slower it tends to go. As you become distracted from time's passing—perhaps by something interesting happening nearby, or a good daydreaming session—you're more likely to lose track of time, giving you the feeling that it's slipping by more quickly than before. "Time flies when you're having fun," they say, but really, it's more like "time flies when you're thinking about other things." That's why time will also often fly by when you're definitely <em>not</em> having fun—like when you're having a heated argument or are terrified about an upcoming presentation."</p><p>One of the most mysterious ways people experience time-perception distortions is through psychedelic drugs. In an interview with <a href="https://www.theguardian.com/books/2018/apr/14/carlo-rovelli-exploding-commonsense-notions-order-of-time-interview" target="_blank"><em>The Guardian</em></a>, Rovelli described a time he experimented with LSD.</p><p style="margin-left: 20px;">"It was an extraordinarily strong experience that touched me also intellectually," he said. "Among the strange phenomena was the sense of time stopping. Things were happening in my mind but the clock was not going ahead; the flow of time was not passing any more. It was a total subversion of the structure of reality."<br></p><p>It seems few scientists or philosophers believe time is completely an illusion.</p><p style="margin-left: 20px;">"What we call <em>time</em> is a rich, stratified concept; it has many layers," Rovelli told <em><a href="https://physicstoday.scitation.org/do/10.1063/PT.6.4.20190219a/full/" target="_blank">Physics Today</a>.</em> "Some of time's layers apply only at limited scales within limited domains. This does not make them illusions."</p>What <em>is</em> an illusion is the idea that time flows at an absolute rate. The river of time might be flowing forever forward, but it moves at different speeds, between people, and even within your own mind.
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Controversial physics theory says reality around us behaves like a computer neural network.
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- The scientist's new paper seeks to reconcile classical physics and quantum mechanics.
- The theory claims that natural selection produces both atoms and "observers".
Vanchurin interview:<span style="display:block;position:relative;padding-top:56.25%;" class="rm-shortcode" data-rm-shortcode-id="539759cbfd8fcd5b6ebf14a3b597b3f9"><iframe type="lazy-iframe" data-runner-src="https://www.youtube.com/embed/bmyRy2-UhEE?rel=0" width="100%" height="auto" frameborder="0" scrolling="no" style="position:absolute;top:0;left:0;width:100%;height:100%;"></iframe></span>
Vanchurin on “Hidden Phenomena”:<span style="display:block;position:relative;padding-top:56.25%;" class="rm-shortcode" data-rm-shortcode-id="18886ffd5e5840bb19d4494212f88d82"><iframe type="lazy-iframe" data-runner-src="https://www.youtube.com/embed/2NDVdNwsHCo?rel=0" width="100%" height="auto" frameborder="0" scrolling="no" style="position:absolute;top:0;left:0;width:100%;height:100%;"></iframe></span>Vitaly Vanchurin speaking at the 6th International FQXi Conference, "Mind Matters: Intelligence and Agency in the Physical World." The Foundational Questions...
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