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.

Hoping to help grid operators adapt to changes buffeting the power markets, TotalEnergies is assembling a portfolio of battery farms and natural-gas-fired power plants.

© Desiré van den Berg for The New York Times

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.

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

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