tailpipe

The “State of the Air” report tracks two main types of air pollution: ozone pollution, largely a factor of tailpipe emissions and heat, and particle pollution, driven primarily by drought and wildfires.

The 31 regulatory actions are also occurring alongside job cuts and efforts to curtail California’s authority to set tailpipe emissions.

Based on that change, Trump’s EPA revoked the state’s legal waiver from the EPA, preventing it from enforcing its tailpipe emissions standards.

The state would need Trump’s EPA to issue a new waiver in 2025 that would allow California to go beyond the federal standards for tailpipe emissions.

For decades, Southern California’s war on smog has focused on strategies to reduce pollution from tailpipes and smokestacks.