Starting in 2009, the U.S. government have given car manufacturers towards reducing greenhouse gas emissions if they included "start-stop" systems in cars with internal combustion engines. (These systems automatically shut off idling engines to reduce pollution and fuel consumption.) But this week the new head of America's Environmental Protection Agency eliminated the credits, reports Car and Driver: [America's] Environmental Protection Agency previously supported the system's effectiveness, noting that it could improve fuel economy by as much as 5 percent. That said, the use of these systems has never actually been mandated for automakers here in the States. Companies have instead opted to install the systems on all of their vehicles to receive off-cycle credits from the feds. Virtually every new vehicle on sale in the country today also allows drivers to turn the feature off via a hard button as well. Still, that apparently isn't keeping the EPA from making a move against the system. "I absolutely hate Start-Stop systems," writes long-time Slashdot reader sinij (who says they "specifically shopped for a car without one.") Any other Slashdot readers want to share their opinions? Post your own thoughts and experiences in the comments. Start-Stop systems — fuel-saving innovation, or a modern-day auto annoyance"

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The Detroit Big Three -- General Motors, Ford and Stellantis -- have collectively announced more than $50 billion in write-downs on their electric-vehicle businesses after years of aggressive investment into a transition that, even before Republican lawmakers abolished a $7,500 federal tax credit last fall, was already running below expectations. U.S. EV sales fell more than 30% in the fourth quarter of 2025 once the credit expired in September, and Congress also eliminated federal fuel-efficiency mandates. More than $20 billion in previously announced investments in EV and battery facilities were canceled last year -- the first net annual decrease in years, according to Atlas Public Policy. GM has laid off thousands of workers and is converting plants once earmarked for EV trucks and motors to produce gas-powered trucks and V-8 engines. Ford dissolved a joint venture with a South Korean conglomerate to make batteries and now plans to build just one low-cost electric pickup by 2027. Stellantis is unloading its stake in a battery-making business after booking the largest EV-related charge of any automaker so far. Outside the U.S., the trajectory looks different: China's BYD recently overtook Tesla as the world's largest EV seller.

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