Which factor can prompt an immediate review of emissions regulations by the Pennsylvania Department of Environmental Protection?

Changes in federal law can prompt an immediate review of emissions regulations by the Pennsylvania Department of Environmental Protection because state regulations often need to align with federal standards. When there are alterations at the federal level, such as updates or modifications to the Clean Air Act or other environmental legislation, states are typically required to reassess and potentially revise their regulations to ensure compliance and maintain eligibility for federal funding. This alignment is essential for maintaining robust regulatory frameworks that address emissions comprehensively and effectively.

Public protests, local government requests, and industry lobbying, while they can influence policies or draw attention to specific issues, do not create an immediate obligation for regulatory review in the same way that changes to federal law do. These other factors may lead to consideration or discussion of regulations, but federal law changes carry a mandate that directly impacts state regulatory structures.