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 vary wildly. One alternative-fuels lobbying group... 3 billion cars by 2050 would need biofuels to offset climate impact: projection
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 vary wildly. One alternative-fuels lobbying group... 
As a presidential candidate, Donald Trump vowed to "bring back coal" as part of a larger program to encourage greater production of fossil fuels. But the coal industry believes it needs more than an ostensibly friendly administration in Washington to survive. With coal production down and electric utilities continuing to switch to lower-cost... 
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 aerodynamics and weight reduction. Volvo Trucks sells... 
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 to enforce environmental regulations. But what may... 
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 alternatives to fossil fuels has proven much more... 
For more than 13 years, London has collected a stiff charge from motor vehicles entering the congested core of the city during weekday business hours. Known as the congestion charge, the fee of £11.50 a day, or $14.50 (£10 with automatic payment, or $12.50) is levied from 6 am to 7 pm Monday through Friday except holidays. First... 
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 decision on emissions standards made by the... 
Estimates of electric-car market share over the coming decades vary wildly, but certain trends seem to be working in their favor. Battery prices should continue to fall, and tougher global emissions standards may put increasing pressure on automakers to build larger numbers of electric cars. But can automakers handle a sudden increase in... 
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 significantly over the last decade, household... ![The White House, Washington, D.C. [Creative Commons license by dcjohn]](http://images.hgmsites.net/tmb/white-house_100170583_t.gif)
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 place. Last week, executives of 18 automakers sent...