Mark Hertsgaard

@markhertsgaard

Mark Hertsgaard is the environment correspondent of The Nation and the executive director of the global media collaboration Covering Climate Now. His new book is Big Red’s Mercy:  The Shooting of Deborah Cotton and A Story of Race in America.

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.

Jul 16, 2026 / 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.

Jul 9, 2026 / 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.”

Jul 2, 2026 / Mark Hertsgaard

People jump in the Trocadero Fountain near the Eiffel Tower during a heat wave in Paris on June 22, 2026.

This Summer’s Heat Is Only the Beginning This Summer’s Heat Is Only the Beginning

Temperatures in France this week have reached 112 degrees Fahrenheit. This may be one of the coolest summers to come.

Jun 25, 2026 / Mark Hertsgaard

The New York Times Building

Why Aren’t Newsrooms Covering This AI Speech? Why Aren’t Newsrooms Covering This AI Speech?

A.G. Sulzberger urges the media to unite and fight back.

Jun 18, 2026 / Mark Hertsgaard

Aerial view of the Mexico City Stadium two days before the start of the 2026 World Cup on June 9, 2026, in Mexico City, Mexico.

The Hottest World Cup in History The Hottest World Cup in History

The World Cup is not just a sports story. It’s a climate one, too.

Jun 11, 2026 / Mark Hertsgaard

The ConocoPhillips Oil Refinery is seen in Wilmington, California, on April 11, 2026.

The Oil Era Is Ending The Oil Era Is Ending

Is the Iran war a death knell for America’s oil hegemony?

May 21, 2026 / Mark Hertsgaard

Passengers watch as unseen health personnel assists patients onto a boat from the cruise ship MV Hondius, while stationary off the port of Praia, the capital of Cape Verde, on May 6, 2026. Evacuations were taking place because of a deadly outbreak of hantavirus.

The Hantavirus Is Also a Climate Warning The Hantavirus Is Also a Climate Warning

Higher temperatures, like this coming summer’s, bring more infectious diseases.

May 14, 2026 / Mark Hertsgaard

Santa Marta May Be a Game-Changing Moment for the Climate

Santa Marta May Be a Game-Changing Moment for the Climate Santa Marta May Be a Game-Changing Moment for the Climate

At a crucial climate conference, a critical mass of countries begins mapping a fossil fuel phaseout.

Apr 30, 2026 / Mark Hertsgaard

A press conference from the First International Conference on the Transitioning Away From Fossil Fuels.

Wait, Could This Be a Climate Conference That Actually Works? Wait, Could This Be a Climate Conference That Actually Works?

As the Iran war highlights fossil fuel risks, a coalition of the willing pursues a global phaseout.

Apr 27, 2026 / Mark Hertsgaard

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