How the U.S. Became an Unlikely Leader in Reducing Carbon Emissions

Emissions of CO2 in the U.S. have fallen almost 13 percent since 2007 - "perhaps the biggest decline among industrial countries." Rather than the result of an enlightened policy shift, the drop has resulted from market forces, says Eduardo Porter.

2 minute read

March 20, 2013, 11:00 AM PDT

By Jonathan Nettler @nettsj


"Who would have thought the United States would one day be a leader in cutting greenhouse gas emissions?" asks Porter. "Yet when President Obama talked about the nation’s energy revolution during his State of the Union address last month, he could have boasted that American emissions of CO2 had fallen almost 13 percent since 2007. It was perhaps the biggest decline among industrial countries, and substantially steeper than in Europe, which has been much more committed to combating climate change."

"Carbon emissions from the United States have never fallen this much," he adds, "not after the first oil price shock following the Arab oil embargo of 1973, nor after the Iranian revolution of 1979, when American drivers suddenly discovered the virtues of Japanese small cars and President Jimmy Carter installed solar panels on the White House to heat the water."

"What stands out most in this shift, however, is not environmental regulation or public concern about global warming but the price of energy and market-driven technological advancements. 'It wasn’t so much a policy shift that brought carbon emissions down,' said James Hamilton, an energy economist at the University of California, San Diego. 'It was irresistible market forces.'”

The shift from coal to gas-powered generators has been a major cause of the decline. But is the shift, which was largely due to the falling price of gas, sustainable? And, as coal use has grown at a rate "10 times that of renewables" since 2000, can other countries follow America's accidental lead in reducing emissions?

Tuesday, March 19, 2013 in The New York Times

portrait of professional woman

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching. Mary G., Urban Planner

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban Planner

Cover CM Credits, Earn Certificates, Push Your Career Forward

Logo for Planetizen Federal Action Tracker with black and white image of U.S. Capitol with water ripple overlay.

Planetizen Federal Action Tracker

A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

July 16, 2025 - Diana Ionescu

Green vintage Chicago streetcar from the 1940s parked at the Illinois Railroad Museum in 1988.

Chicago’s Ghost Rails

Just beneath the surface of the modern city lie the remnants of its expansive early 20th-century streetcar system.

July 13, 2025 - WTTV

Blue and silver Amtrak train with vibrant green and yellow foliage in background.

Amtrak Cutting Jobs, Funding to High-Speed Rail

The agency plans to cut 10 percent of its workforce and has confirmed it will not fund new high-speed rail projects.

July 14, 2025 - Smart Cities Dive

Worker in yellow safety vest and hard hat looks up at servers in data center.

Ohio Forces Data Centers to Prepay for Power

Utilities are calling on states to hold data center operators responsible for new energy demands to prevent leaving consumers on the hook for their bills.

July 18 - Inside Climate News

Former MARTA CEO Collie Greenwood standing in front of MARTA HQ with blurred MARTA sign visible in background.

MARTA CEO Steps Down Amid Citizenship Concerns

MARTA’s board announced Thursday that its chief, who is from Canada, is resigning due to questions about his immigration status.

July 18 - WABE

Rendering of proposed protected bikeway in Santa Clara, California.

Silicon Valley ‘Bike Superhighway’ Awarded $14M State Grant

A Caltrans grant brings the 10-mile Central Bikeway project connecting Santa Clara and East San Jose closer to fruition.

July 17 - San José Spotlight