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An interview with journalist and academic Christina Gerhardt, who maps the shifting geographies of islands in her new book Sea Change.
The scattered Pacific islands of Kiribati are famously at the frontlines of climate change.
Two of the nation’s islands disappeared underwater as early as 1999, and in the years since Kiribati’s residents have had to grapple with the likelihood that more will meet the same fate by mid-century. Already, one in seven moves there are due to the encroaching seas.
In an attempt to provide options, in 2012, the president of Kiribati bought 6,000 acres of land on Fiji, as an alternate home for his people. But Fiji itself — larger, more mountainous, but still vulnerable — also faces the need to relocate its own communities. As the world heats up, islanders have had to reorient their lives around fraught decisions and constant change.
Kiribati is just one of the 49 islands (or collections of islands) that environmental journalist and academic Christina Gerhardt details in her book, Sea Change: An Atlas of Islands in a Rising Ocean, out this month from University of California Press. Working with cartographer Molly Roy, Gerhardt paints portraits of what is at stake as each island watches the seas creep gradually higher, from decimated coral reefs to inundated farms.
Sea level rise is not just about a slowly moving line on a map, said Gerhardt when we spoke about the book. It is a dynamic phenomenon that changes everything from coastal erosion to storm surge, high winds to flooding.
“A livable life isn't about whether or not one is underwater,” Gerhardt said.
There’s a huge range in the population and political power of the islands highlighted, spanning Singapore to Pine Island in the Antarctic Ocean. But Sea Change is woven together by what each island has in common: A relationship to sea level rise that is more urgent and more nuanced than those of us on the continents often appreciate.
What follows is the rest of our conversation, edited for brevity and clarity.
There's no shortage of scientific data outlining the latest numbers with regard to sea level rise. And while that data is absolutely vital, my approach was to weave the science in with these other components.
What I'm really bringing to the forefront in Sea Change is an atlas that depicts the histories and the cultures, and the languages, and the flora, and the fauna of islands. How people will connect with and appreciate islands and islanders is through their history and cultures. You have to provide something to engage with, and that’s where the work of the environmental humanities is really important.
Every single island has a different cluster of issues. So for every island, I gave our cartographer, Molly Roy, different elements to focus on. For one island, it might be the fact that what’s imperiled by sea level rise is agriculture: If you have too much salt water in soil, the plants can’t take up the water they need to survive. For another, I had her focus on sea turtle nesting grounds, which can be inundated or destroyed by sea level rise.
Ultimately, sea level rise should not be thought of as a line, but rather as a zone of inundation. The Marshall Islands, for example, are on average six and a half feet above sea level, and three feet of sea level rise is expected by the end of the century. You may think “Oh, well, that’s not going to be an issue then.” But a livable life isn't about whether or not one is underwater. It's whether or not that home has been inundated enough that it's soggy and moldy and just not inhabitable anymore.
No, this was a huge challenge when we started. The inequities that frontline communities suffer also play out in the resources that are allocated for mapping.
We started the map of the East and the West Coasts of North America, from Deal Island in the Chesapeake Bay to islands off the western coast of Alaska. We have no problem finding data for these islands.
And then we moved into the Pacific. The islands that we had the easiest time getting data for are ones that have U.S. military bases on them, like Guam or the Marshall Islands. But when we were talking about independent nations that don't have this kind of relationship to the U.S., we had a really hard time finding the data. To track down this data I would contact ministers of environment, and other government agencies, and they often didn't have it themselves.
First of all, I have some issues with the tendency to frame islands as harbingers of what awaits people who are continental land dwellers. I think the situation facing islands should, in and of itself with no other qualifications, be of concern. Full-stop.
That said, we also have to think about the audience and how to cast a wide net and share stories from one geographic region with people who are predominantly of another geographic region, which happens to be the hegemonic one. It was really important to also underscore that this is not a situation that remains relevant only to people who are living on islands. Almost half of the U.S. population, about 40 percent, live in coastal states and cities. That's about 130 million people in the US that are going to be impacted. And so I think this is something that we really need to grapple with.
The question of how to get movement on a global stage is a really important one. One of the successes coming out of the UN meeting last year was the push for the establishment of a loss and damage fund. It basically lays the blame of creating the climate crisis squarely at the feet of nations in the Global North, and asks them to compensate frontline nations in the Global South for the damages that have been created. The details have yet to be worked out, but it took 30 years to get to that point. Tina Stege, who was climate envoy for the Marshall Islands, was one of the tenacious leaders who really worked intensely to get this across the finish lines.
The UN gets criticized all the time because it’s so slow — which is true — and because even if there is an agreement that comes out of the UN, it’s not legally binding — also true. But I think the UN is a really important vehicle because it’s the one forum in which 198 nations get together and nations in the Global North do have to listen to these speeches from members of nations in the Global South. Before the latter weighs in, they typically describe the situation in their home countries. And so if you go to the UN, you have a really visceral sense of what’s going on around the world — last year was the floods in Pakistan, and then it was the drought in the Horn of Africa. That sharing between nations happens every year, but I don’t see coverage of these issues. The papers don’t really seem motivated.
The first kind of island in Sea Change is low-lying islands or atolls — often just a couple of feet high, a couple yards across, a couple of miles long — which are the ones that are most at risk. And then there are the high islands, also known as volcanic islands, which often still have active volcanoes. Obviously, the atolls are the ones that are most at-risk, but I decided to include volcanic islands as well, which initially puzzled my cartographer and editor: “These aren’t going to be underwater,” they said. That’s right, but that doesn’t mean they aren’t at risk. On those islands, most people and infrastructure are clustered around the coastline, so they’re going to be at-risk from sea level rise.
In terms of solutions, I talk a lot about soft engineering, or nature-based solutions. This would include the preservation and restoration of coral and oyster reef, and of mangroves and wetlands. Coral reefs and oyster reefs buffer waves when they come toward the island, which is important because wave action is responsible for eroding the coastline. Mangroves also provide a buffer, as one of the only trees that can deal with that high salinity of soil. They also provide a really important marine habitat, where little tiny fish swim around their roots and big predator fish can’t get in. A lot of these things have been ripped from the coastlines to set up urban environments, like harbors or airports.
There’s also hard-engineering, like the great U they’re putting around the tip of Manhattan, or the sea walls in Venice. These are so expensive, and often by the time they’re in place sea level rise has increased to yet another level where they’re not enough to do the work they were originally intended to do.
When I was teaching at Princeton, my students were often so despondent because of all of the catastrophes and disasters unfolding. And I always said it's important to just pick your area and do what you can. You don’t need to solve every issue, everywhere. Just pick your thing. Some people love working in their communities; some people like working more at the international level; some people really like engaging with some of the sources of the catastrophe (meaning the fossil fuel industry and the politicians who are supportive of subsidies for fossil fuels); some people work on the shift to renewables, and consider becoming electricians. There’s no shortage of action points to pick.
I think the really important message for people who are in the Global North that I would love to see connected to Sea Change is that we are the source of the emissions. So even as we go about our busy lives, there are things we can do large and small to actually tip the scales and have a direct impact on people who are in frontline communities. And those inequities are not just global, they're also within our own nation. But action is better than inaction. And of course systemic change is more important than individual change, but I don't want to discount the latter.
Exactly.
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The grid needs transformers, and transformers need foreign steel.
President Trump wants to unleash American energy dominance, reduce consumer costs, and lead on artificial intelligence. But his 25% steel and aluminum tariffs, which are set to go into effect next month, could work directly against all of those goals.
The reason has to do with a crucial piece of electrical equipment for expanding the grid. They’re called transformers, and they’re in critically short supply.
Transformers serve to reduce losses along power lines by regulating voltage as electricity travels between generators and end uses, and they are made using a specific type of steel called grain oriented electrical steel, or GOES. There’s only one domestic producer of GOES — Cleveland Cliffs — and at full capacity it cannot meet even half of the demand from domestic transformer manufacturers, according to Joe Donovan, the executive director of the Transformer Manufacturing Association of America.
“We’re forced into the international markets,” he told me. “Reliance on a single domestic supplier for this critical material is a national security risk,” he added later in an email.“The grid is the foundation of our entire economy and should not be reliant on a single source for such a critical component.”
In a fact sheet about the upcoming steel and aluminum tariffs, Trump said he wants to end the “global dumping” of cheap foreign steel into American markets. It’s not yet clear whether he will impose blanket fees on all steel imports from all countries or use a finer tooth comb. But GOES only accounts for 0.15% of global steel production, Donovan said. “Any new restrictive tariffs would not onshore domestic GOES manufacturing, but would instead increase electricity costs for American consumers and delay upgrades to the grid nationally, putting manufacturing projects and developments at risk,” he told me. He said his trade group is advocating for the tariffs to exclude GOES imports from allied countries including Italy, South Korea, Poland and Japan, as well as derivative products from Mexico and Canada.
The problem is not just that the U.S. doesn’t produce enough of this material, Donovan added. Cleveland Cliffs lacks the capacity to produce GOES “in the size or efficiency levels that are needed in modern, efficient large power transformers,” he said. “Thus, domestic transformer manufacturers are unable to procure this GOES from any domestic source.”
Transformers come in many varieties and sizes, from the small metal boxes that sit atop local power lines to the larger containers at substations that have big metal coils springing out of them. Adding anything to the grid — whether it’s a generator like a new solar farm or natural gas plant, or a new source of demand like an apartment complex or a data center — requires adding transformers.
For nearly two decades, electricity growth was stagnant in the U.S., and there wasn’t much reason to invest in transformer manufacturing or supply chains. But suddenly, the rise of artificial intelligence, coupled with a push to reshore manufacturing and electrify transport, plus worsening natural disasters that damage electrical infrastructure caused demand to soar. These pressures have not just affected the U.S., and transformer manufacturers globally have not been able to keep up. Over the past four to five years, lead times for procuring transformers went from just under a year to upwards of three years, and prices jumped 60% to 80%, according to Wood Mackenzie.
“The increase in equipment costs is both threatening the economics of projects and increasing the price of electricity,” analysts from the energy research firm wrote in October. “One small ray of light from a transformer cost perspective is that the price of grain oriented electrical steel, a key commodity input, has declined 60-70% recently.”
Trump’s tariffs will cut into those declines.
“A lot of utilities and all of our clients across the country are very nervous about the potential implications of this,” Ben Boucher, a senior analyst at Wood Mackenzie, told me. “I think everyone knows their costs are going to increase as a result, even if they source domestically, because there’s going to be more competition for domestically produced products.”
When Trump imposed tariffs on steel during his first presidency, it did not lead to new investment in domestic manufacturing of GOES. Instead, there was an uptick in imports of transformer cores, a component that already contains GOES, from Mexico and Canada, Boucher said.
I reached out to the Edison Electric Institute, the main trade group for utilities, for comment on how the transformer shortage has affected its members’ ability to meet rising electricity demand, and what the tariffs could mean for them. The group did not answer my questions and sent back a statement attributed to Scott Aaronson, the senior vice president for energy security and industry operations, which said the group supports the president’s goal of bolstering domestic manufacturing and looks forward to working with him “to ensure that any new tariffs don't raise customer energy bills due to higher commodity prices.”
Jonas Nahm, an associate professor at Johns Hopkins, who worked as a senior economist at the White House under Biden, told me there was a concerted effort to increase transformer production domestically over the past four years. Several manufacturers, including Siemens Energy and Hitachi Energy, announced new plants and plant expansions. Nahm wondered whether Trump’s tariffs on steel could end up undermining his goals by making those investments riskier. “In econ terms, it’s sort of a tariff inversion, where we’re tariffing the intermediate inputs more than we’re tariffing the import of the final product.”
We often talk about industries like the “oil industry” or the “steel industry” as if they are making homogenous, interchangeable products. In reality, neither oil nor steel is one, uniform thing, and in the context of policymaking — like President Trump’s tariffs — the differences are consequential.
My colleague Robinson Meyer wrote about this when Trump was threatening to put 25% tariffs on Canadian imports. The U.S. is the biggest producer of crude oil in the world, but the oil that comes out of our wells is “light and sweet,” meaning that it has relatively low viscosity and sulfur content. Meanwhile, many U.S. refineries are designed to process the “heavy and sour” crude oil extracted in Canada. Tariffs on imported oil would lead to spikes in gasoline prices. “You couldn’t create a better scenario to destroy the economics of U.S. coking refineries,” Rory Johnston, an oil markets analyst, told Robinson. Similarly, the U.S. is a major steel producer, but we’re still heavily reliant on imports for certain types of steel.
It’s unclear whether the administration is aware of the issue. Trump is imposing tariffs on steel and aluminum under Section 232 of the Trade Expansion Act of 1962, as he did during his first term, which requires the Department of Commerce to first conduct an investigation and confirm that the import of these products threatens U.S. national security. But there’s been no new investigation since Trump took office. In his proclamation announcing the tariffs, the President referenced the investigation his administration conducted in 2018, adding in some recent data points that make the case that the threats from then are still an issue.
“They’re operating with 2018 assumptions about the state of the world, and then threw some updated data in there in order to accelerate the process,” Nahm said. “You can see how maybe this wasn’t a big deal six years ago. Now electricity demand is going up, and it’s getting more expensive. That wasn’t something that was on the horizon in 2018 at all.”
On the IEA’s latest report, flooding in LA, and Bill Gates’ bad news
Current conditions: Severe thunderstorms tomorrow could spawn tornadoes in Mississippi, Louisiana, Arkansas, and Alabama • A massive wildfire on a biodiverse island in the Indian Ocean has been burning for nearly a month, threatening wildlife • Tropical Cyclone Zelia has made landfall in Western Australia with winds up to 180mph.
Bill Gates’ climate tech advocacy organization has told its partners that it will slash its grantmaking budget this year, dealing a blow to climate-focused policy and advocacy groups that relied on the Microsoft founder, Heatmap’s Katie Brigham has learned. Breakthrough Energy, the umbrella organization for Gates’ various climate-focused programs, alerted many nonprofit grantees earlier this month that it would not be renewing its support for them. This pullback will not affect Breakthrough’s $3.5 billion climate-focused venture capital arm, Breakthrough Energy Ventures, which funds an extensive portfolio of climate tech companies. Breakthrough’s fellowship program, which provides early-stage climate tech leaders with funding and assistance, will also remain intact, a spokesperson confirmed. They would not comment on whether this change will lead to layoffs at Breakthrough Energy.
“Breakthrough Energy made up a relatively small share — perhaps 1% — of climate philanthropy worldwide,” Brigham writes. “But what has made Breakthrough Energy distinctive is its support for policy and advocacy groups that promote a wide range of technological solutions, including nuclear energy and direct air capture, to fight climate change.”
Anti-wind activists have joined with well-connected figures in conservative legal and energy circles to privately lobby the Trump administration to undo permitting decisions by the National Oceanic and Atmospheric Administration, according to documents obtained by Heatmap’s Jael Holzman. Representatives of conservative think tanks and legal nonprofits — including the Caesar Rodney Institute, the Heartland Institute and Committee for a Constructive Tomorrow, or CFACT — sent a letter to Interior Secretary Doug Burgum dated February 11 requesting that the Trump administration “immediately revoke” letters from NOAA to 11 offshore wind projects authorizing “incidental takes,” a term of regulatory art referencing accidental and permissible deaths under federal endangered species and mammal protection laws. The letter also requested “an immediate cession of construction” at four offshore wind projects with federal approvals that have begun construction: Dominion Energy’s Coastal Virginia offshore wind project, Copenhagen Infrastructure Partners’ Vineyard Wind 1, and Ørsted’s Revolution Wind and Sunrise Wind projects.
“This letter represents a new stage of Trump’s war on offshore wind,” Holzman writes. “Yes, he has frozen leasing, along with most permitting activity and even public meetings related to pending projects. But the president's executive order targeting offshore wind opened the door to rescinding leases and previous permits. Doing so would produce new, costly legal battles for developers and for publicly-regulated utilities, ratepayers. Over the past few weeks, offshore wind developers with projects that got their permits under Biden have sought to reassure investors that at least they’ll be fine. If this new request is heeded, that calm will subside.”
Heavy downpours triggered flooding and debris flows across Los Angeles County yesterday. A portion of the Pacific Coast Highway, one of the most iconic roadways in America, is closed indefinitely due to mudslides near Malibu, an area devastated in last month’s fires. Duke’s Malibu, a famous oceanfront restaurant along the PCH, was inundated. The worst of the rain has passed now and many flood alerts have been canceled, but the cleanup has just begun.
Rain flows down a street outside a burned home.Mario Tama/Getty Images
Global electricity use is set to rise by 4% annually through 2027, “the equivalent of adding an amount greater than Japan’s annual electricity consumption every year,” according to the International Energy Agency’s new Electricity 2025 report. Here are some key points:
IEA
JPMorgan Chase clients have apparently been demanding more guidance about the climate crisis. As a result, the bank launched a new climate report authored by its global head of climate advisory, Sarah Kapnick, an atmospheric and oceanic scientist who was previously chief scientist at the National Oceanic and Atmospheric Administration. The report seeks to build what Kapnick is calling “climate intuition” – the ability to use science to assess and make strategic investment decisions about the shifting climate. “Success in the New Climate Era hinges on our ability to integrate climate considerations into daily decision-making,” Kapnick writes. “Those who adapt will lead, while others risk falling behind.” Here’s a snippet from the report, to give you a sense of the tone and takeaways:
“Adhering to temperatures below 1.5C will require emissions reductions. Depending on your definition of 1.5C, they may require historic annual reductions and potentially carbon removal. Conversely, if you have a technical or financial view that carbon dioxide removal will not scale, you should assume there is a difficult path to 1.5C (i.e. emissions reductions to zero depending on your definition in 6, 15, or 30+ years). If that is the case, you need to plan for the physical manifestations of climate change and social responses that will ensue if your investment horizons are longer.”
Greenhouse gas leaks from supermarket refrigerators are estimated to create as much pollution each year as burning more than 30 million tons of coal.
Grantees told Heatmap they were informed that Bill Gates’ climate funding organization would not renew its support.
Bill Gates’ climate tech advocacy organization has told its partners that it will slash its grantmaking budget this year, dealing a blow to climate-focused policy and advocacy groups that relied on the Microsoft founder, Heatmap has learned.
Breakthrough Energy, the umbrella organization for Gates’ various climate-focused programs, alerted many nonprofit grantees earlier this month that it would not be renewing its support for them. This pullback will not affect Breakthrough’s $3.5 billion climate-focused venture capital arm, Breakthrough Energy Ventures, which funds an extensive portfolio of climate tech companies. Breakthrough’s fellowship program, which provides early-stage climate tech leaders with funding and assistance, will also remain intact, a spokesperson confirmed. They would not comment on whether this change will lead to layoffs at Breakthrough Energy.
“Bill Gates and Breakthrough Energy remain as committed as ever to using our voice and resources to advocate for the energy innovations needed to address climate change,” the Breakthrough spokesperson told me in a written statement. “We continue to believe that innovation in energy is essential for achieving global climate goals and securing a prosperous, sustainable world for future generations.”
Gates founded Breakthrough Energy in 2015 to help develop and deploy technologies that would help the world reach net-zero emissions by 2050. The organization made more than $96 million in grants in 2023, the most recent year for which data is available.
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Among its beneficiaries was the Breakthrough Institute, a California-based think tank that promotes technological solutions to climate change. (Despite having a similar name, it is not affiliatedwith Breakthrough Energy.) Last week, a representative from Breakthrough Energy told the institute’s executive director, Ted Nordhaus, that its funding would not be renewed. The Breakthrough Institute had previously received a two-year grant of about $1.2 million per year, which wrapped up this month.
“What we were told is that they are ceasing all of their climate grantmaking — zeroed out immediately after the USAID shutdown because Bill wants to refocus all of his grantmaking efforts on global health,” Nordhaus told me on Monday, referring to the Trump administration’s efforts to defund the United States Agency for International Development. “But it’s very clear that this wasn’t brought on solely by USAID. I had heard from several people that there was a big reassessment going on for a couple of months.”
The Breakthrough spokesperson disputed this characterization, and denied that cutbacks were due to the USAID shutdown or a shift in funding from climate to global health initiatives. The spokesperson also told me that some grantmaking budget remains, though they would not reveal how much.
As for Breakthrough Institute, the funding cut will primarily impact its agricultural program, which received about 90% of its budget from Breakthrough Energy. Nordhaus is trying to figure out how to keep that program afloat, while the institute’s other three areas of policy focus — energy and climate, nuclear innovation, and energy and development — remain largely unaffected.
Multiple other organizations confirmed to Heatmap that they also will not receive future grants from Breakthrough Energy. A representative for the American Center for Life Cycle Assessment, a trade organization for sustainability professionals, told me that Breakthrough had recently informed the group that it would not renew a $400,000 grant, which is set to wrap up this May. (ACLCA’s spokesperson also noted that the grant had not come with any indication that it would be renewed.) Another former grantee told me that while their organization is currently wrapping up a grant with Breakthrough and does not have anything in the works with them for this year, they expected that future funding would be impacted, though they did not explain why.
Breakthrough Energy made up a relatively small share — perhaps 1% — of climate philanthropy worldwide. Foundations and individuals around the world gave a total of $9 billion to $15 billion to climate causes in 2023, according to an analysis from the Climateworks Foundation.
But what has made Breakthrough Energy distinctive is its support for policy and advocacy groups that promote a wide range of technological solutions, including nuclear energy and direct air capture, to fight climate change.
“Their presence will be missed,” said the CEO of another climate nonprofit who was notified by Breakthrough that its funding would not be renewed. Breakthrough Energy “was one of the few funders supporting pragmatic research and advocacy work that pushed at neglected areas such as the need for zero-carbon firm power and accelerated energy innovation,” they added.
"Even if it’s a drop in the bucket, it still makes a difference,” another former grantee with a particularly large budget told me. This organization recently sent Breakthrough an inquiry about partnering up again and is waiting to hear back. “But for small organizations, it’s make it or break it.”
Speculation abounds as to the rationale behind Breakthrough’s funding cuts. “I have heard that one of the reasons that Bill decided to stop funding climate was that he concluded that there was so much money in climate that his money really wasn’t that important,” Nordhaus told me. But that is not true when it comes to agriculture, he said, which comprises about 12% of global emissions. ”There’s very little money for advocating for agriculture innovation to address the climate impacts of the ag sector,” Nordhaus told me.
Gates, who privately donated to a nonprofit affiliated with the Harris campaign in 2024 but did not endorse the Democrat, dined with Trump and Susie Wiles, the White House chief of staff, for more than three hours at Mar-a-Lago around New Year’s Day, he told Wall Street Journal editor-in-chief Emma Tucker. He said that Trump was interested in the possibility of eradicating polio or developing an HIV vaccine. “I felt like he was energized and looking forward to helping to drive innovation,” he told her, days before the inauguration.
Since then, Trump’s war on USAID has frozen funding to a polio eradication program and shut down the phase 1 clinical trial of an HIV vaccine in South Africa, Kenya, and Uganda.