EPA Recommends Scrapping GHG Endangerment Finding
February 26, 2025
The EPA Administrator Lee Zeldin has recommended to the White House that the GHG endangerment finding be scrapped.
The EPA Administrator Lee Zeldin has recommended to the White House that the GHG endangerment finding be scrapped.
A summary of the high-level changes announced by the White House, EPA and other related agencies and their potential impact on the transport sector.
In light of the Trump administrations executive orders limiting EV mandates and incentives, hybrids might offer a pathway for continued fuel economy improvements. This post summarizes the key findings on their CO2 reduction potential.
A summary of a study comparing the direct manufacturing costs of the VW Tiguan and ID4
The SAE World Congress was held in Detroit and covered a broad range of topics pertinent to transport decarbonization. Here’s a link to download presentations on emissions and sustainability.
EU Commission finds real-world CO2 emissions from cars and vans in Europe greatly exceed lab certification values. Plug-in hybrids are not being charged as much as estimated.
The EPA final rule will require a fleet averaged 50% reduction in CO2 emissions for light-duty vehicles, over MY 2027 – 2032.
How is vehicle fuel economy (mpg) measured in the US ? Ever wonder how those city / highway MPG (miles per gallon) numbers on the sticker come from ? Here you go. The US EPA requires vehicle fuel consumption to be measured using lab chassis dynamometer testing. A representative vehicle is run over five test cycles, listed below along with the respective ambient temperatures: FTP-75 at 75 F: Represents city driving. Includes 3 measurements called bags (because the emissions are collected in bags !), with the first bag after a cold start (>12 hour overnight “soak”) and a hot start with engine off for only 10 min. HFET at 75 F: Highway fuel economy test US06 at 75 F: High speed and aggressive urban driving SC03 at 95 F: Represents the impact of air conditioner use at high temperatures Cold FTP at 20 F : Impact of cold ambient temperatures The above tests measure the fuel consumption over a wide range of driving conditions and provide a realistic assessment of on-road performance to the consumer. Note that till a few years back, only two cycles were used to measure the fuel economy: FTP-75 and HFET. Miles per gallon numbers from
