US environmental regulators delay stricter car emissions for two years

US environmental regulators are delaying stricter pollution standards for new cars and trucks. This means car manufacturers can keep making vehicles that meet older, less strict limits for model years 2027 and 2028.

Car manufacturers now have more time to design and build vehicles that meet cleaner air requirements. This pushes back the cost of retooling factories and developing new engine technologies for two years, but it also means more pollution from new vehicles during that time.