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President Joe Biden signed sweeping actions to combat climate change hours after taking the oath of office, moving to rejoin the Paris accord and imposing a moratorium on oil leasing in the Arctic National Wildlife Refuge.

The world spent a record $501.3 billion in 2020 on renewable power, electric vehicles and other technologies to cut the global energy system’s dependence on fossil fuels.

A new government report says gas mileage for new vehicles dropped and pollution increased in model year 2019 for the first time in five years.

Exxon Mobil Corp. released emissions data on customers’ use of its petroleum products for the first time after coming under pressure from investors.

It’s going to take $2.5 trillion in spending over the next decade to get the U.S. on a path to a carbon-free economy, but the transition will help to pay for itself, Princeton University researchers say.

Gov. Gavin Newsom has named one of California’s utility-company regulators to lead the state agency that fights air pollution and climate change.

Carmakers that signed up for President Donald Trump’s battle with California over auto emissions are now being pressured to join a peace plan brought on by the election of Joe Biden.

General Motors Co. will withdraw from the legal battle between the Trump administration and California officials over the state’s authority to set automobile emissions rules, a major shift in the contentious fight that has fractured the industry.

Original equipment manufacturers and engine suppliers have found a variety of ways to meet the challenges posed by the 2021 Phase 2 standards for greenhouse gas emissions and fuel efficiency.

Diesel can play a central role for the transportation sector as it moves toward a more sustainable future, a panel of experts said.