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Media articles related to climate interventions.

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Diamonds are not a geoengineer’s best friend

23 March 2026, Leah Shaffer, Climate interventions

The field of solar geoengineering revolves around the idea of cooling the globe via the injection of aerosols to reflect sunlight or to thin clouds. One such strategy, stratospheric aerosol injection (SAI), aims to mimic the effects of a volcanic eruption. But sulfate aerosols are not ideal particles to deploy because of their negative environmental effects. Instead, researchers have used large-scale climate models to run virtual solar geoengineering experiments with different particles. Previous such research pointed to a sparkling alternative: diamond dust. However, researchers at Washington University in St. Louis have found it won’t work.

Atmosphere / solar radiation -> Arctic winter high-latitude seasonal stratospheric aerosol injection

Why a new generation of scientists is studying how to dim the sun

12 March 2026, Gloria Dickie, www.nationalobserver.com

A growing wave of Gen Z scientists and engineers across the world pursuing higher education in climate geoengineering, grasping for a feeling of agency as they inherit the woes wrought by older generations. Although a controversial topic, younger people seem much more open to research on the topic geoengineering.

Atmosphere / solar radiation -> Space-based solar radiation management

Geoengineering The Gulf Of Maine

10 March 2026, Steve Hanley,

The ocean is the largest carbon sink on Earth, holding about 38,000 gigatons of carbon. But when carbon dioxide dissolves in water, it creates a weak acid that lowers the pH of the ocean. The lower the pH, the less carbon dioxide the ocean can absorb. Today, the ocean has the lowest pH in the last million years. Now, scientists at the Woods Hole Oceanographic Institute in Massachusetts have embarked on what they call the LOC-NESS project, which stands for “Locking Ocean Carbon in the Northeast Shelf and Slope.” The scientists say that “oceanic carbon is stored as dissolved bicarbonate — essentially dissolved baking soda — thanks to the natural weathering processes that enhance ocean alkalinity on geological timescales.”

Oceans & marine -> Ocean Alkalinity enhancement

Sinking trees into the Arctic Ocean could reduce carbon emissions. But is it worth it?

20 February 2026, Bob MacDonalad, www.cbc.ca

Trees are well known for their ability to store carbon dioxide, but this storage solution is not forever. When trees rot or burn in a wildfire, they release that carbon back into the atmosphere. A group of scientists from the UK, Switzerland, and the Czech Republic proposed an idea to sink mature trees from the vast boreal forest into the deep Arctic Ocean to lock away their carbon for centuries to come.

Land-based measures

Climate engineering would alter the oceans, reshaping marine life – our new study examines each method’s risks

14 January 2026, Kelsey Roberts, Daniele Visioni, Morgan Raven, Tyler Rohr, theconversation.com

Scientists, governments, and a growing number of startups are exploring ways to remove carbon dioxide from the atmosphere or at least temporarily counter its effects. But these climate interventions come with risks—especially for the ocean, the world’s largest carbon sink, where carbon is absorbed and stored, and the foundation of global food security. In a new study, a team of researchers analyzed how different types of climate interventions could affect marine ecosystems, for good or bad, and where more research is needed to understand the risks before anyone tries them on a large scale. They found that some strategies carry fewer risks than others, though none is free of consequences.

Oceans & marine

The Scientists Making Antacids for the Sea to Help Counter Global Warming

08 January 2026, Ferris Jabr, Climate interventions

Oceans absorb about one-third of humanity’s heat-trapping carbon emissions. Without this buffer, the planet would be substantially warmer and more tempestuous than it is today. As carbon dioxide from the atmosphere dissolves into the ocean, however, it changes the ocean, reducing its capacity to absorb more carbon and threatening marine life. Scientists are now exploring ocean-based carbon geoengineering known as ocean alkalinity enhancement, which involves adding chemicals to make oceans less acidic. Modifying the planet’s chemistry in this way may allow more carbon to flow from the atmosphere to the ocean, where it can be stored for thousands of years.

Oceans & marine -> Ocean Alkalinity enhancement

We study glaciers. ‘Artificial glaciers’ and other tech may halt their total collapse

07 January 2026, Brent Minchew and Colin Meyer, www.theguardian.com

Sea levels are rising faster than at any point in human history, and for every foot that waters rise, 100 million people lose their homes. At current projections, that means about 300 million people will be forced to move in the decades to come, along with the social and political conflict as people migrate inland. How might we prevent sea-level rise? Satellite-based radar, solar-powered drones, robot submarines and lab-based ‘artificial glaciers’ could all play a role.

Ice sheets and glaciers

We can safely experiment with reflecting sunlight away from Earth. Here’s how

06 January 2026, Dakota Gruener and Daniele Visioni, www.theguardian.com

The world is warming fast and our options to avoid catastrophic harm are narrowing. 2024 was the first full year more than 1.5C hotter than the 19th-century average. Emissions are still rising, with fossil fuel use expected to hit a new high in 2025. Cutting emissions and scaling carbon removal remain essential. But they may not be enough. Reflecting a small fraction of incoming sunlight to reduce global heating is not a new idea. It is time to safely experiment.

Atmosphere / solar radiation -> Space-based solar radiation management

Polar geoengineering: risks and realities

09 September 2025, Various, www.frontiersin.org

Earth’s coldest regions help regulate the global climate, but climate change-driven warming is destabilizing polar ice at alarming rates. Could large-scale geoengineering proposals protect against ice-sheet loss and slow down sea-level rise? Siegert et al. critically assess five proposed technologies for effectiveness, feasibility, consequences, cost, and governance challenges, concluding that none are currently viable and several pose serious ecological or equity risks. The technologies assessed are stratospheric aerosol injection, sea curtains/sea walls, sea ice management, slowing ice sheet flow through basal water removal, and ocean fertilization. The lead article, and complementary publications in this hub, analyze the scientific and policy dimensions of polar geoengineering research, with perspectives ranging from caution to advocacy, and emphasize the continued urgency of rapid decarbonization.

Protecting Permafrost: Addressing the Climate Threat of Arctic Thaw

01 September 2025, Ian Graham, cascadeinstitute.org

Protecting Permafrost: Addressing the Climate Threat of Arctic Thaw examines the significant climate threat posed by Arctic permafrost thaw. Climate heating is causing permafrost to thaw, leading to the release of heat-trapping gases like carbon dioxide and methane, which in turn accelerates climate change. The report assesses 13 potential interventions to slow or stop thaw and reduce emissions, with three being ready for deployment: wildfire management, caribou herding, and conservation or restoration of peatlands and wetlands. We emphasize the need for a comprehensive approach, including improving scientific understanding, gathering better data, developing permafrost thaw models, and creating governance frameworks.

Land-based measures

Woods Hole Tests Ocean Alkalinity Enhancement in Gulf of Maine for CO2 Capture

12 August 2025, Victoria Mossi , www.webpronews.com

Scientists from Woods Hole Oceanographic Institution will test ocean alkalinity enhancement by adding 20 tons of sodium hydroxide to the Gulf of Maine, aiming to boost CO2 absorption and combat climate change. While promising for carbon sequestration, it raises ecological and ethical concerns. Success could advance geoengineering, but rigorous monitoring is essential. Collaborations with institutions like those involved in the Arctic Ocean 2050 program could also inform how alkalinity enhancements interact with polar ecosystems facing rapid warming.

Oceans & marine -> Ocean Alkalinity enhancement

Workshop Report: The Governance of Arctic Climate Interventions

11 August 2025, Odessa Chitty, Justin Barnes, Elizabeth Hanlon, Jennifer Spence and Tessa Varvares, www.belfercenter.org

This report is based on insights from a two-day workshop hosted by the Belfer Center’s Arctic Initiative at the Harvard Kennedy School in late April 2025. The workshop brought together Indigenous, technical, academic, policy, and legal experts and practitioners to discuss the governance of research, testing, and potential deployment(s) of climate interventions in the Arctic. This workshop was convened to facilitate Arctic-specific discussions about the governance of climate interventions with the view that this is both important and timely. Its aim was to provide a space to move beyond polarizing positions, enable constructive discussions, and consider and further develop Arctic-specific research questions and issues. This report aims to capture what occurred at the workshop, but at most, it provides only a snapshot of the diversity of perspectives and voices related to this topic in the Arctic region.

Could bouncing the sun’s heat back into space help solve the climate crisis?

07 August 2025, Seán Duke, www.irishtimes.com

As global temperatures climb and extreme weather events become more frequent, scientists are exploring the use of solar geoengineering, a set of different measures all geared towards reflecting sunlight and cooling the Earth. “The world is making progress on emissions,” says solar geoengineering researcher Dr Pete Irvine of the University of Chicago, “but even if every country meets its current pledges, we are still tracking towards more than 2.5 degrees of warming by century’s end.” That level of warming could lead to severe impacts such as loss of biodiversity, health crises and unchecked polar melting. In addition to solar geoengineering, enhanced weathering and direct carbon capture are two other technologies actively being researched to help bring down the temperature.

Atmosphere / solar radiation

Researchers quietly planned a test to dim sunlight. They wanted to ‘avoid scaring’ the public.

27 July 2025, Corbin Hiar, www.politico.com

A team of researchers in California drew notoriety last year with an aborted experiment on a retired aircraft carrier that sought to test a machine for creating clouds.  But behind the scenes, they were planning a much larger and potentially riskier study of salt-water-spraying equipment that could eventually be used to dim the sun’s rays. The details outlined in funding requests, emails, texts and other records obtained by POLITICO’s E&E News raise new questions about a secretive initiative that oversaw last year’s brief solar geoengineering experiment on the San Francisco Bay. They also offer a rare glimpse into the vast scope of research aimed at finding ways to counter the Earth’s warming, work that has often occurred outside public view. Such research is drawing increased interest at a time when efforts to address the root cause of climate change — burning fossil fuels — are facing setbacks in the U.S. and Europe. But the notion of human tinkering with the weather and climate has drawn a political backlash and generated conspiracy theories, adding to the challenges of mounting even small-scale tests.

Atmosphere / solar radiation -> Arctic Marine Cloud Brightening

Opinion: Against The Arctic Island Laboratory

21 July 2025, Cody Alexander Skahan, grapevine.is

Iceland is frequently portrayed as a hotspot for carbon capture and storage partially because of the country’s “abundance” of cheap, renewable energy and geological makeup (formed millions of years ago) suitable for CO2 mineralisation to support direct air capture of carbon. Through his anthropological PhD research on the social and cultural dimensions of these projects, the author has observed that Iceland is also chosen for these projects because of its perceived social and political license for such projects. This is a problematic perception rooted in others treating Iceland as an isolated “island laboratory”.

Oceans & marine

Geoengineering: Assessing Risks in the Era of Planetary Security

17 July 2025, Olivia Lazard, Mandi Bissett, and James Dyke, carnegieendowment.org

Global warming now routinely surpasses the 1.5° Celsius threshold, prompting growing interest in geoengineering as a solution to reduce the effects of climate change. However, these approaches pose serious environmental, social, and geopolitical challenges. This paper is a primer for policymakers, particularly in Europe. It introduces a novel framework through which to view the risks associated with the individual and combined effects of various geoengineering approaches.

EPA releases online info on contrails and geoengineering amid conspiracy theories

11 July 2025, Kalé Carey, san.com

The U.S. Environmental Protection Agency (EPA) has launched new online resources providing information on contrails and geoengineering amid concerns among some Americans. The website provides an overview of the basics of geoengineering, potential impacts of solar geoengineering, and answers to frequent questions. The move comes as conspiracy theories about cloud seeding are spreading in the wake of deadly Texas flooding.

Atmosphere / solar radiation

Global Surveys Challenge Assumptions on Public Opinion of SRM

10 July 2025, Chad Baum, Benjamin Sovacool and Livia Fritz, srm360.org

In discussions about SRM, a handful of assumptions about public opinion are often taken for granted. Some of these well-worn tropes have gone largely unexamined – until recently. Specifically, that SRM is inherently controversial; opposition is most prevalent in the Global South; and there is broad support for a global ban or moratorium on SRM. But new evidence strongly challenges some conventional assumptions about public attitudes. This research yielded important insights into public perceptions of SRM, summarized in this article. It is hoped that these insights will shape ongoing discussions and debates around SRM, and demonstrate the clear need for inclusive and deep engagement with the general public.

Atmosphere / solar radiation

Reduce, remove, reflect — the three Rs that could limit global warming

08 July 2025, Dante McGrath, theconversation.com

The three Rs of climate action: reduce, remove, and reflect. Reducing greenhouse gas emissions is at centre stage, while greenhouse gas removal offers a supporting role by removing historical emissions and offsetting residual emissions from sectors lagging behind in the energy transition. However, the consequences of climate change are outpacing efforts to abate it. With each year, the likelihood of exceeding 1.5 and 2°C warming increases, posing major risks to society and Earth’s ecosystems. That’s why the third R — reflect — needs to be assessed.

Atmosphere / solar radiation

What an effort to save Arctic sea ice means to the people who depend on it

03 July 2025, Chloe Williams, thenarwhal.ca

Ice thickening is an example of a category of highly controversial interventions aimed at modifying the climate to combat warming. The Real Ice project in Cambridge Bay, Nunavut, has drawn sharp criticism from scientists, who question the environmental impacts of the company’s experimental efforts and the feasibility of scaling up. But unlike many geoengineering projects, Real Ice’s experiments have garnered local support so far. For some residents, the goal of saving sea ice resonates because it supports the continuation of cultural and traditional practices. Others see applications for sea ice thickening besides fighting climate change. At a smaller scale, it could be useful for building roads, reinforcing snowmobile routes or supporting fish and wildlife populations. Five Cambridge Bay residents discuss what sea ice means to them, as well as how they see their home changing and, if they have heard about Real Ice, what they think about the effort.

Sea ice & icebergs

Results

"Diamonds are not a geoengineer’s best friend"

23 March 2026, Leah Shaffer, Climate interventions

"Why a new generation of scientists is studying how to dim the sun"

12 March 2026, Gloria Dickie, www.nationalobserver.com

"Geoengineering The Gulf Of Maine "

10 March 2026, Steve Hanley,

"Sinking trees into the Arctic Ocean could reduce carbon emissions. But is it worth it?"

20 February 2026, Bob MacDonalad, www.cbc.ca

"Climate engineering would alter the oceans, reshaping marine life – our new study examines each method’s risks"

14 January 2026, Kelsey Roberts, Daniele Visioni, Morgan Raven, Tyler Rohr, theconversation.com

"The Scientists Making Antacids for the Sea to Help Counter Global Warming"

08 January 2026, Ferris Jabr, Climate interventions

"We study glaciers. ‘Artificial glaciers’ and other tech may halt their total collapse"

07 January 2026, Brent Minchew and Colin Meyer, www.theguardian.com

"We can safely experiment with reflecting sunlight away from Earth. Here’s how"

06 January 2026, Dakota Gruener and Daniele Visioni, www.theguardian.com

"Polar geoengineering: risks and realities"

09 September 2025, Various, www.frontiersin.org

"Protecting Permafrost: Addressing the Climate Threat of Arctic Thaw "

01 September 2025, Ian Graham, cascadeinstitute.org

"Woods Hole Tests Ocean Alkalinity Enhancement in Gulf of Maine for CO2 Capture"

12 August 2025, Victoria Mossi , www.webpronews.com

"Workshop Report: The Governance of Arctic Climate Interventions"

11 August 2025, Odessa Chitty, Justin Barnes, Elizabeth Hanlon, Jennifer Spence and Tessa Varvares, www.belfercenter.org

"Could bouncing the sun’s heat back into space help solve the climate crisis?"

07 August 2025, Seán Duke, www.irishtimes.com

"Researchers quietly planned a test to dim sunlight. They wanted to ‘avoid scaring’ the public."

27 July 2025, Corbin Hiar, www.politico.com

"Opinion: Against The Arctic Island Laboratory"

21 July 2025, Cody Alexander Skahan, grapevine.is

"Geoengineering: Assessing Risks in the Era of Planetary Security"

17 July 2025, Olivia Lazard, Mandi Bissett, and James Dyke, carnegieendowment.org

"EPA releases online info on contrails and geoengineering amid conspiracy theories"

11 July 2025, Kalé Carey, san.com

"Global Surveys Challenge Assumptions on Public Opinion of SRM"

10 July 2025, Chad Baum, Benjamin Sovacool and Livia Fritz, srm360.org

"Reduce, remove, reflect — the three Rs that could limit global warming"

08 July 2025, Dante McGrath, theconversation.com

"What an effort to save Arctic sea ice means to the people who depend on it"

03 July 2025, Chloe Williams, thenarwhal.ca

Media

Filter

Diamonds are not a geoengineer’s best friend

Why a new generation of scientists is studying how to dim the sun

Geoengineering The Gulf Of Maine

Sinking trees into the Arctic Ocean could reduce carbon emissions. But is it worth it?

Climate engineering would alter the oceans, reshaping marine life – our new study examines each method’s risks

The Scientists Making Antacids for the Sea to Help Counter Global Warming

We study glaciers. ‘Artificial glaciers’ and other tech may halt their total collapse

We can safely experiment with reflecting sunlight away from Earth. Here’s how

Polar geoengineering: risks and realities

Protecting Permafrost: Addressing the Climate Threat of Arctic Thaw

Woods Hole Tests Ocean Alkalinity Enhancement in Gulf of Maine for CO2 Capture

Workshop Report: The Governance of Arctic Climate Interventions

Could bouncing the sun’s heat back into space help solve the climate crisis?

Researchers quietly planned a test to dim sunlight. They wanted to ‘avoid scaring’ the public.

Opinion: Against The Arctic Island Laboratory

Geoengineering: Assessing Risks in the Era of Planetary Security

EPA releases online info on contrails and geoengineering amid conspiracy theories

Global Surveys Challenge Assumptions on Public Opinion of SRM

Reduce, remove, reflect — the three Rs that could limit global warming

What an effort to save Arctic sea ice means to the people who depend on it

Results

"Diamonds are not a geoengineer’s best friend"

"Why a new generation of scientists is studying how to dim the sun"

"Geoengineering The Gulf Of Maine "

"Sinking trees into the Arctic Ocean could reduce carbon emissions. But is it worth it?"

"Climate engineering would alter the oceans, reshaping marine life – our new study examines each method’s risks"

"The Scientists Making Antacids for the Sea to Help Counter Global Warming"

"We study glaciers. ‘Artificial glaciers’ and other tech may halt their total collapse"

"We can safely experiment with reflecting sunlight away from Earth. Here’s how"

"Polar geoengineering: risks and realities"

"Protecting Permafrost: Addressing the Climate Threat of Arctic Thaw "

"Woods Hole Tests Ocean Alkalinity Enhancement in Gulf of Maine for CO2 Capture"

"Workshop Report: The Governance of Arctic Climate Interventions"

"Could bouncing the sun’s heat back into space help solve the climate crisis?"

"Researchers quietly planned a test to dim sunlight. They wanted to ‘avoid scaring’ the public."

"Opinion: Against The Arctic Island Laboratory"

"Geoengineering: Assessing Risks in the Era of Planetary Security"

"EPA releases online info on contrails and geoengineering amid conspiracy theories"

"Global Surveys Challenge Assumptions on Public Opinion of SRM"

"Reduce, remove, reflect — the three Rs that could limit global warming"

"What an effort to save Arctic sea ice means to the people who depend on it"