emissions

The Sierra Club and the European Group Transport & Environment have presented an analysis suggesting ride-hailing is adding to pollution.

The annual efficiency report from the IEA reveals a number of factors that have slowed worldwide energy efficiency improvement.

With all loopholes banished, the new rules will reduce CO2, claimed the EPA Administrator in a recent Detroit address.

Passenger SUVs are to blame for growth in CO2 emissions, an upcoming paper finds, while the passenger-car sector has made CO2 reductions.

How have emissions due to driving changed, as opposed to the emissions from power generation? An interactive map helps round it up.

European nations and cities are ramping up bans on vehicles with combustion engines. A similar effort has been considered in California.

About 98,000 VW, Audi, Bentley, and Porsche vehicles allegedly game federal emissions tests used for fuel economy calculations.

The findings of a German court could reopen the Volkswagen diesel scandal.

Automakers frustrated with the lack of progress toward federal fuel economy and emissions standards made a deal with California.

The Obama-era Clean Power Plan has been set aside by the U.S. EPA, and now states are suing the agency over the enforcement of carbon dioxide emissions.

At least one startup may be getting close to scaling up fuel production with carbon captured from the air. But burning the fuel would still pollute.

A proposal in California could impose an emissions-check system for commercial big rigs much like that required of passenger vehicles.

Ford, Volkswagen, BMW, and Honda have presented a plan with California, to raise fuel economy toward a target of 50 mpg with a single national fleet.

A proposal aims to target 100 percent renewable energy by 2050, but doesn't take as broad of a focus on other aspects of the Green New Deal.

Carbon dioxide emissions in the U.S. will drop 2.2 percent in 2019, the EIA predicts. That is largely due to the retirement of coal plants.

The emergency resolution that declares climate change a national emergency would trigger a more focused effort on carbon emissions.

A wide range of Hyundai and Kia vehicles, starting with the 2020 Sonata, will be soon be getting engines with a next-generation valve system.

In the aftermath of the diesel scandal, the VW Group explains the new European WLTP standards, which include various tailpipe tests.

Europeans aren't buying as many electric cars as regulators would like them to buy; the popularity of crossovers and SUV is also an issue.

The top official at the EPA overseeing tailpipe emissions has resigned, prior to any resolution over proposed emissions and fuel economy rules.