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Climate

Last Summer Was the Hottest in 2,000 Years

On historical heat data, clean hydrogen, and solar geoengineering

Last Summer Was the Hottest in 2,000 Years
Heatmap Illustration/Getty Images

Current conditions: Wildfires continue to burn out of control in western Canada • An early season heat wave will bring record high temperatures to parts of Florida • One in eight Europeans now live in an area at risk of flooding.

THE TOP FIVE

1. Study: Last summer was the hottest in 2,000 years

We already know that last summer was the hottest “on record” – but those records only really go back to the 1850s or so. A new study published in the journal Nature looks further into the past and concludes that last summer was the warmest in some 2,000 years in the Northern Hemisphere. To reach this conclusion, researchers examined thousands of tree rings, which offer clues about a year’s temperature and moisture levels. The tree ring data suggests last summer was about 4 degrees Fahrenheit warmer than the average temperature of the years 1 AD to 1890 AD. The study warns that summer 2024 could be even warmer than 2023.

A separate study out yesterday concluded that Southeast Asia’s intense April heat wave was fueled by man-caused climate change. In the Philippines, for example, a 15-day heat wave pushed the heat index to 113 degrees Fahrenheit, disrupting daily life and forcing many schools to close. This extreme weather would have been “impossible” without climate change, the study found.

2. House Democrats launch probe into Trump’s meeting with Big Oil execs

House Democrats have launched an investigation into a recent Mar-a-Lago dinner where former President Donald Trump reportedly asked Big Oil bosses to put $1 billion toward his 2024 presidential campaign and promised to roll back some environmental rules should he win back the White House. The House oversight committee sent letters to oil executives from Cheniere Energy, Chesapeake Energy, Chevron, Continental Resources, EQT Corporation, ExxonMobil, Occidental Petroleum, Venture Global and the American Petroleum Institute. They want the companies to list who attended the meeting, provide copies of any documents distributed, describe any policies that were discussed, and disclose any contributions made to Trump’s campaign during or after the dinner, according to The Washington Post. The top Democrat on the committee, Rep. Jamie Raskin, gave the executives a deadline of May 27 to turn over information, but the committee’s investigative powers are limited by the GOP’s control of the House. “If the oil companies decline to turn over the information, Democrats will not be able to subpoena the firms, stymying their investigation,” explained the Post.

3. Trump chides Biden on new Chinese EV tariffs

President Biden confirmed yesterday that he is imposing a 100% tariff on Chinese-made electric vehicles, as well as tariff increases on other clean energy technologies including lithium batteries, solar cells, and critical minerals. Former President Trump, speaking from outside the New York courtroom where his hush money trial is taking place, said: “Where have they been for three-and-a-half years? They should have done it a long time ago.”

There is no equivalence between Biden’ tariffs and the 10% across the board tariff on all imported goods from all countries that Trump has proposed, wrote Heatmap’s Robinson Meyer. “Biden’s new tariffs focus on certain strategic sectors that American officials believe the country must cultivate to stay at the technological frontier, coupled with pre-existing subsidies meant to spur domestic production of those goods. Some of the tariffs only kick in beginning in 2026 — far enough in the future, policymakers hope, for the market to prepare. Trump’s tariffs, meanwhile, would intentionally and chaotically hike prices.”

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  • 4. DOE offers Plug Power $1.66 billion conditional loan for green hydrogen plants

    The Department of Energy yesterday offered Plug Power a conditional commitment of $1.66 billion in loan guarantees to build up to six clean hydrogen plants that use the company’s electrolyzer technology. The hydrogen would “power fuel cell-electric vehicles used in the material handling, transportation, and industrial sectors, resulting in an estimated 84% reduction in greenhouse gas emissions compared to conventional hydrogen production,” the DOE announcement said. Most hydrogen production uses fossil fuels to run an electrolyzer that splits water into hydrogen and oxygen. But clean hydrogen relies on electrolyzers powered by renewable sources – or natural gas with carbon capture. The Biden administration sees clean hydrogen as a key part of its push to decarbonize heavy industry. The deal isn’t done yet – Plug will have to prove its projects will benefit local communities and “satisfy certain technical, legal, environmental, and financial conditions” before the loan goes ahead. But the news sent Plug’s stock soaring nonetheless.

    5. California officials pause solar geoengineering study over safety concerns

    In case you missed it earlier this week (I did!), officials in California have ordered researchers to stop using an aerosol sprayer to test a potential solar geoengineering process for cooling the planet, The New York Times reported. The Cloud Aerosol Research Instrument, or CARI, sits on the flight deck of the Hornet, a decommissioned aircraft carrier in Alameda, California. It sprays sea salt aerosol particles into the air, a process that could one day be used to brighten clouds and reflect the sun’s rays. This experiment, which began in early April, marked the first time such a device had been tested outdoors in the U.S. But the city of Alameda told the scientists to stop their research until the health and environmental impacts of the experiment can be evaluated. “The city is evaluating the chemical compounds in the spray to determine if they are a hazard either inhaled in aerosol form by humans and animals, or landing on the ground or in the bay,” city officials said.

    THE KICKER

    Police in the U.K. could soon carry “Ghostbusters-style devices” that use electromagnetic rays to stop e-bike engines if a rider is suspected of being involved in a crime.

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    Sparks

    Major Renewables Nonprofit Cuts a Third of Staff After Trump Slashes Funding

    The lost federal grants represent about half the organization’s budget.

    The DOE wrecking ball.
    Heatmap Illustration/Getty Images

    The Interstate Renewable Energy Council, a decades-old nonprofit that provides technical expertise to cities across the country building out renewable clean energy projects, issued a dramatic plea for private donations in order to stay afloat after it says federal funding was suddenly slashed by the Trump administration.

    IREC’s executive director Chris Nichols said in an email to all of the organization’s supporters that it has “already been forced to lay off many of our high-performing staff members” after millions of federal dollars to three of its programs were eliminated in the Trump administration’s shutdown-related funding cuts last week. Nichols said the administration nixed the funding simply because the nonprofit’s corporation was registered in New York, and without regard for IREC’s work with countless cities and towns in Republican-led states. (Look no further than this map of local governments who receive the program’s zero-cost solar siting policy assistance to see just how politically diverse the recipients are.)

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    Climate Tech

    Trump Just Torpedoed Investors’ Big Bets on Decarbonizing Shipping

    The delayed vote on a net-zero standard for the International Maritime Organization throws some of the industry’s grandest plans into chaos.

    An hourglass and a boat.
    Heatmap Illustration/Getty Images

    Today, members of the International Maritime Organization decided to postpone a major vote on the world’s first truly global carbon pricing scheme. The yearlong delay came in response to a pressure campaign led by the U.S.

    The Net-Zero Framework — initially approved in April by an overwhelming margin and long expected to be formally adopted today — would establish a legally binding requirement for the shipping industry to cut its emissions intensity, with interim steps leading to net zero by 2050.

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    Spotlight

    How a Giant Solar Farm Flopped in Rural Texas

    Amarillo-area residents successfully beat back a $600 million project from Xcel Energy that would have provided useful tax revenue.

    Texas and solar panels.
    Heatmap Illustration/Getty Images

    Power giant Xcel Energy just suffered a major public relations flap in the Texas Panhandle, scrubbing plans for a solar project amidst harsh backlash from local residents.

    On Friday, Xcel Energy withdrew plans to build a $600 million solar project right outside of Rolling Hills, a small, relatively isolated residential neighborhood just north of the city of Amarillo, Texas. The project was part of several solar farms it had proposed to the Texas Public Utilities Commission to meet the load growth created by the state’s AI data center boom. As we’ve covered in The Fight, Texas should’ve been an easier place to do this, and there were few if any legal obstacles standing in the way of the project, dubbed Oneida 2. It was sited on private lands, and Texas counties lack the sort of authority to veto projects you’re used to seeing in, say, Ohio or California.

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