Despite improvements in vehicle fuel efficiency, 14 states saw increased transportation emissions from 2005 to 2022, signaling a need for urgent policy changes.
The report underscores the importance of focusing on transportation emissions, noting that it has become the largest source of pollution in half of the states.
Some red states successfully contested a federal rule that aimed to enforce self-reporting of transportation emissions, despite it not mandating any reductions.
While some blue states also reported increased emissions, no state is on track to meet the national goal of reducing emissions by 50-52% by 2030.
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