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US EPA proposes easing Biden heavy-truck emissions rules

By Thomson Reuters Jul 9, 2026 | 12:27 PM

WASHINGTON, July 9 (Reuters) – The U.S. Environmental Protection Agency ​on Thursday ‌proposed easing heavy-truck and engine emissions rules adopted under ‌Democratic ​President Joe ⁠Biden in ⁠2023.

The EPA said it was proposing scaling back emissions ​warranty requirements and providing additional ⁠lead time ⁠before longer ​regulatory useful life requirements ​take effect.

The EPA, ‌which noted that some 2027 medium and heavy-duty ⁠engine development programs have experienced technical challenges, is ⁠proposing ‌allowing manufacturers ⁠to continue ​to ‌sell current products ​while they ⁠complete development of 2027-compliant engines.

(Reporting by David Shepardson; Editing by Mark ​Porter)