More than a year ago, U.S. Environmental Protection Agency officials announced the agency’s Cleaner Trucks Initiative, an effort to work closely with the California Air Resources Board to develop a more stringent “harmonized” nitrogen oxide-emissions rule for heavy trucks.

A new study by the National Academy of Sciences urges federal regulators to conduct an “interim evaluation” of the federal medium- and heavy-duty truck Phase 2 greenhouse gas and economy rule with an eye toward more stringent standards.

The Trump administration is readying a plan to end direct federal regulation of methane leaks from oil and gas facilities, even as some energy companies insist they don’t want the relief.

Fresh from a $5.25 billion, nine-year expansion that’s upending decades-old trade routes, it turns out the Panama Canal is also doing a little good for the planet.

The trillion-dollar global shipping industry may soon be forced to curb greenhouse gas emissions under new rules backed by the European Union and China.

FORT WAYNE, Ind. — Strick Trailers will begin offering trailers that it has loaded with features that comply with Phase 2 greenhouse gas mandates intended to make trailers more fuel-efficient.