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Pennsylvania, the heart of the U.S. shale-gas boom and one of the biggest coal-producing states, is joining a carbon market.

California is asking a federal court to prevent President Donald Trump from stripping the state of its power to set limits on auto emissions of greenhouse gases that are stricter than those of the national government.

Daimler AG’s head of sales, facing off with environmentalists at a heated meeting in Berlin, said the company is investing billions of euros to transform its product range to reach emissions targets.

The Trump administration is seeking to abandon regulations designed to stop methane leaks from oil and gas wells, a move opposed not just by environmentalists but even some energy companies that worry that it will undermine the appeal of natural gas as climate-friendly fuel.

Steel could shed its reputation as a climate threat by using hydrogen instead of fossil fuels for as much as half of global output by 2050, according to BloombergNEF.

Amazon.com, Exxon Mobil Corp. and Volvo are among more than 700 companies being targeted in a campaign backed by a large group of investors advocating for greater transparency when it comes to environmental impact.

The White House is rejecting a bid from domestic and foreign automakers to restart talks with California over vehicle emissions regulations.

Although large gains have been made in cleaning up new diesel engines, nearly two-thirds of all commercial trucks don’t meet the latest emissions standards. As of 2017, some 36% of all commercial trucks (Classes 3-8) in the United States rely on the newest generation of diesel engines — a 6% increase over 2016, according to the Diesel Technology Forum, which cited the latest data.

Royal Dutch Shell Plc’s position on climate change is misaligned with about half of the trade associations it’s a part of, and the company says its disagreement with one is so severe that it will let its membership lapse next year.