emissions

An advocacy group charts improvements in car efficiency.

The EPA regulations limiting the amount of carbon that can be emitted by existing powerplants may be the most crucial step forward in environmental policy made by the eight-year Obama Administration. But those regulations will apparently be late in arriving for public comment--and they face a...

Analysis shows the Mercedes-Benz B-Class Electric Drive has significantly lower lifetime emissions than a comparable gasoline model.

Electric cars have no tailpipe emissions, but their overall impact on the environment includes the electricity generated to recharge their batteries. The carbon emissions associated with that power vary greatly, depending on the local utility that provides it. Now an updated study from the Union of...

Brace yourself, electric-car fans and advocates. It may be a bumpy ride for the next few days. Yesterday afternoon, the Associated Press covered a new study put out by the University of Minnesota that calculates the environmental impact of manufacturing and refueling vehicles with various...

The European Union's CleanSky 2 program aims to reduce aircraft emissions.

Your mileage may vary, as the saying goes. But it turns out that real-world fuel efficiency in European cars varies considerably more from official ratings than in the U.S. And some car brands are so far off from their ratings that a buyer may only get two-thirds of the published fuel efficiency...

The Wards Auto Fuel Economy Index recorded a decrease in new-car average fuel economy in November compared to the same time last year.

A Nissan Leaf salesman explains why driving an electric car helped his customers quit smoking.

European cities move to eliminate the dirtiest cars from their streets.

Researchers compare emissions-related deaths to car crashes, with ambiguous results.

For the first time ever, China has agreed to limit its greenhouse-gas emissions, under a deal announced this morning between Chinese president Xi Jinping and U.S. president Barack Obama. In exchange, the U.S. set a goal of cutting its own carbon emissions more deeply by 2025, building on a...

While mankind has been pumping carbon into the atmosphere since the discovery of fire, the modern era of carbon emissions began roughly 250 years ago. Now a new report by global scientists goes further than any before: Carbon emissions must ultimately be cut to levels so low that they approach...

Four groups are suing over a Los Angeles-area smog-reduction plan they say isn't strict enough.

About 18 percent of Americans have used a car-sharing program, according to new data.

European analysts expect stricter diesel-emission standards in the near future.

The environmental impact of plug-in electric cars is a source for much debate these days. They use less energy on a wells-to-wheels carbon basis than the vast majority of new cars sold in North America, even if they're recharged on coal-heavy electric grids. But the manufacturing impact is...

The Union of Concerned Scientists says California's green transport policies will save drivers money.

There's a lot of talk about so-called clean diesel, which in North America means any diesel that meets tailpipe emissions standards that went into effect seven years ago. Those standards, known as Tier II, Bin 5, are among the strictest in the world--and considerably tougher than the European...

California has been a world pioneer for decades in reducing vehicle emissions, including its 20-year effort to get significant numbers of zero-emission vehicles on the roads. It's also had intermittent programs to encourage the trade-in of older cars that qualify as "gross emitters" for newer and...