NPR article:“The EPA proposes gutting its greenhouse gas rules. Here's what it means for cars and pollution” - https://www.npr.org/2025/07/29/nx-s1-5463771/epa-greenhouse-gas-regulations-cars-pollutionUnion of Concerned Scientist Blog:"Indirect Source Rules:An Emerging Towards Clean Freight"https://blog.ucs.org/sam-wilson/indirect-source-rules-an-emerging-route-toward-clean-freight/
