emissions

Tomorrow is expected to be the day when President Donald Trump announces the EPA will reopen the comment period for the vehicle emissions standards it finalized in the waning days of the Obama Administration. The event will likely be accompanied by predictable language: Trump will be...

It seems fair to say that the new presidential administration may have increased the generalized level of worry among many Americans, not to mention the rest of the world. Among the things to worry about are the future of incentives, infrastructure, and legislation encouraging the adoption of...

Even with a new leader apparently at odds with its mission, the Environmental Protection Agency continues to function on some level. On Thursday, EPA administrator Scott Pruitt said carbon dioxide released by human activity is not a major cause of climate change, directly contradicting the...

The U.S. Environmental Protection Agency is emerging as one of the government entities most targeted by the new Trump Administration for change. In this case, if reports of the administration's draft budget proposal are accurate, change means wholesale elimination of staff, funding, and programs...

Imagine appointing a lifelong pacifist, who believes it is never justifiable to take up arms against any man, to run the U.S. armed forces. The appointment of Scott Pruitt as the administrator of the U.S. Environmental Protection Agency could perhaps be viewed in a similar light. In his former...

California leads the nation in policies that promote reductions of carbon emissions from road vehicles. It is unique in having a federal waiver that allows it to set its own, stricter emissions standards, along with a zero-emission vehicle mandate that requires automakers reaching certain sales...

It looks like lobbying pays off, at least in the case of EPA emission rules. According to numerous recent reports, the EPA is expected to reopen the commenting period for vehicle-emission rules it finalized in January, more than a year ahead of schedule. Automaker CEOs and the Alliance of...

It can be argued that the current presidential administration appears to lack interest in the traditional mission of the Environmental Protection Agency. As a candidate, Donald Trump advocated wholesale repeal of environmental regulations and increased production of fossil fuels. He has also called...

The average fuel economy of the new cars and light trucks sold in the U.S. is appreciably higher than it was 10 years ago. The University of Michigan Transportation Research Institute has demonstrated that in its regular reports calculating new-car average fuel economy since October 2007. But...

Even with aggressive promotion of battery-electric or hydrogen fuel-cell cars, hundreds of millions of internal-combustion vehicles will remain on the world's roads for decades to come. But estimates of exactly how many internal-combustion cars will be displaced by alternatives in a given period...

Because they cover significantly more mileage than the average passenger car, with much worse fuel economy, large commercial trucks are a major source of emissions. Last year, Volvo Trucks aimed to address this issue with a concept truck that demonstrated ways to improve fuel efficiency through...

Diesel engines will continue to appear in pickup trucks, European luxury SUVs, and at least a few mass-market crossover utility vehicles. Two of those are the Chevrolet Equinox and Mazda CX-5 crossovers that will launch for the 2018 model year. But the future of diesel in U.S. passenger cars...

The confirmation of Scott Pruitt as Environmental Protection Agency administrator was expected to rankle environmental groups. Pruitt is a climate-science denier who, in his previous position as Oklahoma attorney general, sued the agency he is now charged with many multiple times over its efforts...

If you want to find a major source of transportation-related emissions, just look up. Aviation currently accounts for around 2 percent of global carbon emissions, and many analysts believe its share could triple by the middle of the century if projected growth in air travel occurs. But finding...

Lobbyists for the world's automakers continue to ask the new presidential administration to revisit an EPA decision to finalize emissions standards through 2025. Just days after the November election, the Alliance of Automobile Manufacturers wrote President-Elect Trump to ask that he reverse the...

Substantial growth in U.S. renewable-energy capacity will undoubtedly have a positive environmental impact. But the reduction in carbon emissions renewable-energy advocates aim to achieve does not exclude potential benefits to consumers. Because as renewable-energy generating capacity has expanded...

Just days after the presidential election, automaker lobbyists urged Donald Trump to loosen pending emissions and fuel-economy standards. Shortly after the election, a lobbying group wrote Trump asking him to change or delay an EPA decision that kept planned emissions standards for 2022 to 2025 in...

In the U.S., the Volkswagen diesel scandal was a case of an automaker betraying the trust of more than half a million owners. But in the Europe, the issue of diesel emissions looms far larger yet. Diesels have represented roughly half of European car sales for decades, their good fuel economy being...

Shock waves from Volkswagen's admission that it had installed "defeat device" software on its so-called clean diesels to cheat on emission tests continue to reverberate around the auto industry. The diesel-emission scandal that emerged in September 2015 has already cost VW Group more than $20...

Measuring the energy efficiency of a new vehicle is one thing, but ascertaining its overall environmental impact can be more complex. A debate still rages over the overall carbon footprint of electric cars compared to those powered by fossil fuels. But for the past 20 years, the the American...