Orsted, a Danish wind farm developer, has been hammered by high costs and President Trump’s efforts to stymie renewable energy. Its struggles are rippling across Denmark.

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Ten members of Congress wrote in a letter to the governor that a gas pipeline proposed for New York Harbor runs counter to the state’s emissions reductions goals.

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With federal subsidies ending or becoming hard to claim, companies are racing ahead with solar, wind and battery projects.

© Kyle Grantham for The New York Times

China is building a network of ultrahigh-voltage power lines to carry solar and wind energy hundreds and even thousands of miles as few citizens dare to protest.

China is using the high-altitude expanse for immense solar panel farms and wind turbines and has begun work on the world’s largest hydroelectric dams.

The president is going after clean energy, and Americans will face higher bills as a result.

The world generated more electricity from renewable energy than coal for the first time ever, a new report finds. The United States is lagging behind.

Domestic coal can’t compete with batteries, solar and gas much longer.

While the West is distracted and divided, China is focused and surging ahead.

At the Climate Forward live event, we spoke to top policymakers about China, the Trump effect on climate policy and the boom in artificial intelligence.

In a day of live journalism, California’s governor assailed President Trump, and the U.S. energy secretary called for countries to quit the Paris Agreement on global warming.

On Wednesday in New York, countries lined up to say they would accelerate their efforts to cut greenhouse-gas emissions. In staying away, the U.S. was all but alone.

President Xi Jinping told a U.N. climate summit that China will reduce emissions across its economy, expand renewables sixfold and make electric cars “mainstream.”

Laos is just one of the emerging markets where China’s green-tech revolution is installing more than cheap energy.

Its vast investment in solar, wind and batteries is on track to end an era of global growth in the use of coal, oil and gas, the researchers said.

The two superpowers have made different wagers. But their fates are intertwined.

Across the country, unmasked wildfire fighters are falling ill and dying. Hannah Dreier talks about her investigation into the risks these workers face.

Chinese automakers have rolled out chargers that can mostly recharge a car’s battery in about five minutes. Yet U.S. technology lags far behind.

A surge in high quality research and patent applications has cemented China’s dominance in the industry.