emissions

Automotive engineers are very good at incremental improvements to existing technologies, and that skill will be much tested in meeting increasingly stiff fuel-economy rules between now and 2025. For the 2016 model year, Chrysler has extensively re-engineered its Pentastar V-6 engine, a mainstay...

It sounds like an intriguing idea: Make diesel fuel from air rather than fossil-fuel petroleum. Better yet, make it from carbon dioxide--the greenhouse gas whose concentration in the atmosphere has risen precipitously since the dawn of the Industrial Age. Diesel fuel, after all, is a hydrocarbon...

Renewable-energy costs are dropping rapidly, U.S. Energy Secretary Ernest Moniz says.

A German government study finds that transportation-related emissions have increased since 1990.

Coal is the worst fossil fuel, that much is clear. Its carbon footprint per kilowatt-hour of electricity when it's burned by electric utilities to make electricity is far, far higher than that of natural gas. And that's even before the slowly improving economics of renewable sources come into play...

Mary Nichols, the head of the California Air Resources Board, wants to all but eliminate internal-combustion cars in the Golden State.

With yesterday's release of final EPA rules for reducing carbon emissions from power plants, the stage is set for a major battle over how--and even whether--any carbon emissions in the U.S. may be limited. Meanwhile, there's Norway. As Ola Elvestuen, a member of Parliament there as well as Chair of...

The final version of the EPA's Clean Power Plan was revealed Monday.

There isn't enough investment in renewable energy, a New York Times columnist argues.

Coal power-plant retirements will accelerate in the next few decades, analysts say.

A fleet of autonomous electric taxis could largely replace private cars, researchers argue.

United Airlines will use biofuel on certain flights in California.

A U.K. study suggests a connection between traffic noise and health issues.

The U.S. Environmental Protection Agency has released proposed standards that would further boost the fuel efficiency of heavy-duty trucks and buses, starting in the 2021 model year and running through 2027. The new regulations were announced on Friday by Transportation Secretary Anthony Foxx and...

German carmaker BMW may be on the cusp of the most radical transformation in its history--one that will stun the auto industry if it comes to pass. If a report from early this year is accurate, the company plans to convert the bulk of its product lineup to electric power over the next 10 years...

California works to implement ambitious goals set by Governor Jerry Brown.

The leaders of the world's largest economies hope to gradually eliminate fossil fuels.

New legislation sets ambitious goals to combat climate change.

Air pollution in New Delhi routinely exceeds levels in Beijing.

Artificial photosynthesis involves breaking down CO2 and water molecules, and recombining them into fuel.