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Climate Solutions, News, Observation, Politics

These energy innovations could transform how we mitigate climate change, and save money in the process – 5 essential reads

To most people, a solar farm or a geothermal plant is simply a power producer. Scientists and engineers see far more potential.

They envision offshore wind turbines capturing and storing carbon beneath the sea, and geothermal plants producing essential metals for powering electric vehicles. Electric vehicle batteries, too, can be transformed to power homes, saving their owners money.

photo credit / pexels

With scientists worldwide sounding the alarm about the increasing dangers and costs of climate change, let’s explore some cutting-edge ideas that could transform how today’s technologies reduce the effects of global warming, from five recent articles in The Conversation.

1. Solar canals: Power + water protection

What if solar panels did double duty, protecting water supplies while producing more power?

California is developing the United States’ first solar canals, with solar panels built atop some of the state’s water distribution canals. These canals run for thousands of miles through arid environments, where the dry air boosts evaporation in a state frequently troubled by water shortages.

“In a 2021 study, we showed that covering all 4,000 miles of California’s canals with solar panels would save more than 65 billion gallons of water annually by reducing evaporation. That’s enough to irrigate 50,000 acres of farmland or meet the residential water needs of more than 2 million people,” writes engineering professor Roger Bales of the University of California, Merced. They would also expand renewable energy without taking up farmable land.

Research shows that human activities, particularly using fossil fuels for energy and transportation, are unequivocally warming the planet and increasing extreme weather. Increasing renewable energy, currently about 20% of U.S. utility-scale electricity generation, can reduce fossil fuel demand.

Putting solar panels over shaded water can also improve their power output. The cooler water lowers the temperature of the panels by about 10 degrees Fahrenheit (5.5 Celsius), boosting their efficiency, Bales writes.

2. Geothermal power could boost battery supplies

For renewable energy to slash global greenhouse gas emissions, buildings and vehicles have to be able to use it. Batteries are essential, but the industry has a supply chain problem.

Most batteries used in electric vehicles and utility-scale energy storage are lithium-ion batteries, and most lithium used in the U.S. comes from Argentina, Chile, China and Russia. China is the leader in lithium processing.

Geologist and engineers are working on an innovative method that could boost the U.S. lithium supply at home by extracting lithium from geothermal brines in California’s Salton Sea region.

Brines are the liquid leftover in a geothermal plant after heat and steam are used to produce power. That liquid contains lithium and other metals such as manganese, zinc and boron. Normally, it is pumped back underground, but the metals can also be filtered out. https://www.youtube.com/embed/oYtyEVPGEU8?wmode=transparent&start=0 How lithium is extracted during geothermal energy production. Courtesy of Controlled Thermal Resources.

“If test projects now underway prove that battery-grade lithium can be extracted from these brines cost effectively, 11 existing geothermal plants along the Salton Sea alone could have the potential to produce enough lithium metal to provide about 10 times the current U.S. demand,” write geologist Michael McKibben of the University of California, Riverside, and energy policy scholar Bryant Jones of Boise State University.

President Joe Biden invoked the Defense Production Act on March 31, 2022, to provide incentives for U.S. companies to mine and process more critical minerals for batteries.

3. Green hydrogen and other storage ideas

Scientists are working on other ways to boost batteries’ mineral supply chain, too, including recycling lithium and cobalt from old batteries. They’re also developing designs with other materials, explained Kerry Rippy, a researcher with the National Renewable Energy Lab.

Concentrated solar power, for example, stores energy from the sun by heating molten salt and using it to produce steam to drive electric generators, similar to how a coal power plant would generate electricity. It’s expensive, though, and the salts currently used aren’t stable at higher temperature, Rippy writes. The Department of Energy is funding a similar project that is experimenting with heated sand. https://www.youtube.com/embed/fkX-H24Chfw?wmode=transparent&start=0 Hydrogen’s challenges, including its fossil fuel history.

Renewable fuels, such as green hydrogen and ammonia, provide a different type of storage. Since they store energy as liquid, they can be transported and used for shipping or rocket fuel.

Hydrogen gets a lot of attention, but not all hydrogen is green. Most hydrogen used today is actually produced with natural gas – a fossil fuel. Green hydrogen, in contrast, could be produced using renewable energy to power electrolysis, which splits water molecules into hydrogen and oxygen, but again, it’s expensive.

“The key challenge is optimizing the process to make it efficient and economical,” Rippy writes. “The potential payoff is enormous: inexhaustible, completely renewable energy.”

4. Using your EV to power your home

Batteries could also soon turn your electric vehicle into a giant, mobile battery capable of powering your home.

Only a few vehicles are currently designed for vehicle-to-home charging, or V2H, but that’s changing, writes energy economist Seth Blumsack of Penn State University. Ford, for example, says its new F-150 Lightning pickup truck will be able to power an average house for three days on a single charge. https://www.youtube.com/embed/w4XLBOnzE6Q?wmode=transparent&start=0 How bidirectional charging allows EVs to power homes.

Blumsack explores the technical challenges as V2H grows and its potential to change how people manage energy use and how utilities store power.

For example, he writes, “some homeowners might hope to use their vehicle for what utility planners call ‘peak shaving’ – drawing household power from their EV during the day instead of relying on the grid, thus reducing their electricity purchases during peak demand hours.”

5. Capturing carbon from air and locking it away

Another emerging technology is more controversial.

Humans have put so much carbon dioxide into the atmosphere over the past two centuries that just stopping fossil fuel use won’t be enough to quickly stabilize the climate. Most scenarios, including in recent Intergovernmental Panel on Climate Change reports, show the world will have to remove carbon dioxide from the atmosphere, as well.

The technology to capture carbon dioxide from the air exists – it’s called direct air capture – but it’s expensive.

Engineers and geophysicists like David Goldberg of Columbia University are exploring ways to cut those costs by combining direct air capture technology with renewable energy production and carbon storage, like offshore wind turbines built above undersea rock formations where captured carbon could be locked away.

The world’s largest direct air capture plant, launched in 2021 in Iceland, uses geothermal energy to power its equipment. The captured carbon dioxide is mixed with water and pumped into volcanic basalt formations underground. Chemical reactions with the basalt turn it into a hard carbonate.

Goldberg, who helped developed the mineralization process used in Iceland, sees similar potential for future U.S. offshore wind farms. Wind turbines often produce more energy than their customers need at any given time, making excess energy available.

“Built together, these technologies could reduce the energy costs of carbon capture and minimize the need for onshore pipelines, reducing impacts on the environment,” Goldberg writes.

Editor’s note: This story is a roundup of articles from The Conversation’s archives.

Stacy Morford, Environment + Climate Editor, The Conversation

This article is republished from The Conversation under a Creative Commons license. Read the original article.

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News, Observation, Politics

One Year of Afghanistan War Spending Could Fund Resettlement of 1.2 Million Refugees

Image by Amber Clay from Pixabay 

“We’ve spent billions on war. Now, let’s spend to bring Afghans to safety.”

As the Biden administration faces criticism for not doing enough to assist those fleeing Afghanistan, an analysis released Monday showed that the roughly $19 billion the Pentagon budgeted for the U.S. occupation of the country in 2020 alone could cover initial resettlement costs for 1.2 million refugees.

“We have a duty to save lives—and to do so, we must welcome many, many more refugees as quickly as possible.”

—Rep. Cori Bush

Lindsay Koshgarian of the National Priorities Project estimated that the $18.6 billion the Pentagon allocated for its 2020 operations in Afghanistan—where the Taliban is in the process of retaking powerafter two decades of deadly U.S. occupation—could pay up-front refugee relocation costs of $15,148 for the more than “250,000 Afghans displaced since the end of May (and growing)” and “a significant chunk of the 3.5 million Afghans who were internally displaced as of July.”

“Refugees typically receive some assistance after their arrival, but even if we expanded to cover an additional four years of the approximately $4,600 in annualized social service aid that refugees typically receive, we could still resettle more than half a million people, for just one year’s worth of the cost of fighting,” Koshgarian noted. “We’d face even lower costs to help resettle Afghans in countries closer to home—all the more reason after 20 years of war to step up with some serious resources and get it done.”

“After twenty years,” she added, “we owe the Afghan people at least that much.”

The analysis came as progressive lawmakers in the U.S. and global humanitarian organizations implored the Biden administration to open the U.S. to vulnerable Afghans attempting to escape a growing humanitarian crisis and Taliban rule. According to the United Nations Refugee Agency, 80% of those currently trying to flee Afghanistan are women and children.

In a speech on Monday, U.S. President Joe Biden said that “in the coming days, the U.S. military will provide assistance to move more [Special Immigrant Visa]-eligible Afghans and their families out of Afghanistan.” The Pentagon confirmedMonday that it is planning to house up to 22,000 Afghans at two U.S. bases—Fort Bliss in Texas and Fort McCoy in Wisconsin.

“We’re also expanding refugee access to cover other vulnerable Afghans who worked for our embassy: U.S. non-governmental agencies—or the U.S. non-governmental organizations; and Afghans who otherwise are at great risk; and U.S. news agencies,” the president added.

Following his remarks, Biden directed the U.S. State Department to use up to $500 million from the nation’s Emergency Refugee and Migration Assistance Fund to meet “unexpected urgent refugee and migration needs of refugees, victims of conflict, and other persons at risk as a result of the situation in Afghanistan, including applicants for Special Immigrant Visas.”

But critics have accused the Biden administration of failing to adequately plan for the rapid collapse of the Afghan government that followed the ongoing withdrawal of U.S. forces from the country—a still-deteriorating situation that has left countless people in limbo as they seek safety for themselves and their families.

In his speech Monday, Biden claimed the administration didn’t begin evacuating at-risk civilians sooner “because the Afghan government and its supporters discouraged us from organizing a mass exodus to avoid triggering, as they said, ‘a crisis of confidence.'”

Earlier this month, the U.S. State Department expanded eligibility for the Special Immigrant Visa (SIV) program, opening it to tens of thousands of Afghans who worked for U.S. government contractors, U.S.-based media outlets, and U.S.-based non-governmental organizations. The families of eligible Afghans also have access to the program, whose application process consists of an arduous 14 steps.

And as the Wall Street Journal observed on Monday, the program excludes the poorest Afghans by design. “To claim refugee status,” the Journal noted, “the Afghans must enter through a third country and cover the costs of travel and lodging on their own—a hurdle that is nearly impossible to surmount under the current, chaotic circumstances.”

In a letter to Biden on Monday, the advocacy organization Refugees International called on the administration to “express its willingness initially to resettle up to 200,000 Afghan refugees, as part of an international responsibility-sharing effort to rescue and resettle Afghans at risk.”

“While most would be resettled from countries of asylum,” the group wrote, “a program ultimately could involve direct resettlement from Afghanistan, akin to the Orderly Departure program that resulted in the resettlement of many hundreds of thousands of Vietnamese directly from their country of origin.”

Rep. Cori Bush (D-Mo.), part of a chorus of progressive lawmakers pushing Biden to do more to welcome refugees—in addition to ending the interventionist foreign policy approach that creates such humanitarian crises—noted in a tweetMonday that the U.S. “welcomed 120,000 refugees in a single year” in the aftermath of the Vietnam War.

“Yet the United States has only taken in ~2,000 Afghan refugees thus far,” Bush wrote. “We have a duty to save lives—and to do so, we must welcome many, many more refugees as quickly as possible.”

By JAKE JOHNSON originally published on Common Dreams via Creative Commons.

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