Across the United States, the rules for checking tailpipe pollution are quietly shifting, even as climate targets grow more ...

Under the agreement, Mercedes will pay $120 million upfront, with an additional $29.7 million potentially waived if the ...

GRAP-IV: Researchers at DTU had earlier rolled out an AQI-type PUC certificate system that considered the mileage of vehicles ...

This year’s top emissions & efficiency stories highlight how the Trump administration has influenced emissions regulations as ...