Environment / July 31, 2025

The World Court Adds Muscle to the Climate Fight

After a “landmark” ruling from the International Court of Justice, journalists can expect more lawsuits against fossil fuel companies.

Mark Hertsgaard
The director of the Pacific Islands Students Fighting Climate Change, Vishal Prasad (2nd R), speaks to the media in The Hague on July 23, 2025. The world’s highest court on July 23 declared that states have a legal obligation to tackle climate change and that failing to do so was a “wrongful act” that could open the door to reparations.
The director of the Pacific Islands Students Fighting Climate Change, Vishal Prasad (2nd R), speaks to the media in The Hague on July 23, 2025. The world’s highest court on July 23 declared that states have a legal obligation to tackle climate change and that failing to do so was a “wrongful act” that could open the door to reparations.(John Thys / AFP via Getty Images)

Today’s nonstop news cycle makes it all too easy to lose sight of truly significant events, and last week’s climate ruling by the UN’s International Court of Justice is a striking example. “Landmark” and “historic” were two of the adjectives employed by the many news organizations covering the case, and those adjectives were warranted.

“Landmark” because the ruling shifts the legal and political terrain on which climate policy has been contested for decades. Lawsuits against fossil-fuel companies, and against governments that enable such companies, have been given new ammunition. Experts expect the ruling will spark more lawsuits beyond the nearly 3,000 already underway in 60 countries. For journalists, every one of these lawsuits is a news story.

“Historic” because the ruling addresses the core question that has bedeviled international climate politics since countries began debating the issue at the 1992 UN Earth Summit. The countries most vulnerable to climate change, most of them poor, have long pointed out that they didn’t cause the problem. The planet is overheating because a relatively small number of countries, most of them rich, have burned massive amounts of oil, coal, and gas. As a matter of basic fairness, the argument goes, rich countries should pay poor countries for the damage they are suffering.

This argument has always been, in essence, a moral one, and rich countries have paid it little more than lip service. Despite repeated pledges, they’ve never delivered even the $100 billion a year in aid (itself a gross understatement of the actual damages) required under the Paris Agreement, Oxfam has documented.

Now, however, the ICJ ruling gives this moral argument the force of law. Both CNN and The Guardian said “reparations” are now on the table. Rich countries have “a duty to repair,” the climate minister of Vanuatu, a Pacific island state whose students spearheaded the lawsuit, told Democracy Now!

But does this ruling really matter in today’s world, where international law is being flagrantly violated in Gaza and Ukraine and elsewhere, and China, the United States, and other countries routinely ignore rulings they don’t like?

It might, because other countries do take international law seriously. Harj Narulla, who represented the Solomon Islands in the World Court case, told The New York Times that international law is “automatically incorporated into domestic law in some countries, such as France and Germany.” The same is true in the Netherlands. And courts in the United Kingdom, Canada, and Australia consult international law when ruling on domestic cases.

The ruling might also color developments at the COP30 summit in November, for it obligates governments to “use all means at their disposal” to limit temperature rise to the 1.5-degree-Celsius target of the Paris Agreement. That could make the $7 trillion that the world’s governments annually spend to subsidize fossil fuels unlawful. It could require shutting down 195 oil and gas projects around the world that The Guardian has identified as “carbon bombs” that would “shatter the 1.5C climate goal.” It could make the Trump administration’s proposal, announced on Tuesday, to repeal the EPA’s legal authority to regulate greenhouse gases unlawful.

While it’s too soon to know how the World Court’s ruling will play out in the months ahead, its significance seems beyond doubt. The climate story just got a lot more interesting.

Mark Hertsgaard

Mark Hertsgaard is the author of eight books that have been translated into a total of 16 languages, including Big Red’s Mercy: The Shooting of Deborah Cotton and a Story of Race in America and A Day In the Life: The Music and Artistry of the Beatles. He is executive director of the global journalism collaboration Covering Climate Now and the environment correspondent for The Nation.

More from Mark Hertsgaard Mark Hertsgaard Illustration

Beachgoers rest on the beach of Moutchic on the shore of Lake Lacanau.

As Europe Burns, a Climate Cover-Up Continues As Europe Burns, a Climate Cover-Up Continues

The UK’s Labour Party seems afraid to talk about the climate emergency.

Mark Hertsgaard

Argentina's Lionel Messi (10) sprays water on his face at the World Cup championship final soccer match between Spain and Argentina in East Rutherford, New Jersey, Sunday, July 19, 2026.

World Cup Hydration Breaks Were Not About Commercials World Cup Hydration Breaks Were Not About Commercials

As the world gets hotter, playing sports in the heat gets more dangerous. Telemundo is the only publication that got this right.

Mark Hertsgaard

A roda de samba (samba circle) at the Pagode do Biro in Rio de Janeiro, Brazil.

Slavery’s Musical Threads Slavery’s Musical Threads

As ICE violence resurges in the US, the musical history of black Brazil offers lessons in resistance.

Mark Hertsgaard

An estimated thousand rally and march for climate change in Philadelphia on September 20, 2019, as tens of thousands across the nation and millions globally participate in the Climate Strike.

Will Climate Voters Turn Out in Pennsylvania? Will Climate Voters Turn Out in Pennsylvania?

Interviews across this crucial swing state offer lessons for Democrats hoping to flip the House.

Mark Hertsgaard

A woman carries an umbrella to shelter from the sun as pedestrians cross a street in the Kabukicho entertainment area of Shinjuku in central Tokyo on July 29, 2025.

How Japan’s Media Ecosystem Is Fighting Climate Change How Japan’s Media Ecosystem Is Fighting Climate Change

Hundreds of outlets across the country have joined the “I am the 89%” campaign.

Mark Hertsgaard

People protect themselves from the heat wave that affects daily life as high temperatures continue, on June 26, 2026, in Madrid, Spain.

This Heat is Fatal. We Need to Talk About it. This Heat is Fatal. We Need to Talk About it.

“When people die during heat waves, there’s no sort of gunshot wound.”

Mark Hertsgaard