Beyond CO2, AP’s reporting flags additional nitrogen oxides, volatile organic compounds, and soot under a weaker CAFE trajectory. Those species drive local ozone and particulate problems that atmospheric chemists and EPA inventories track separately from climate CO2. Urban downwind communities often see the chemistry first. Climate and clean-air statutes interact but are not identical — litigators know the difference even when headlines blur them. Monday’s final rule TSD should be mined for the agency’s own precursor tables. AP’s cited projections link softer CAFE to higher smog precursors and soot. Industry analyses may dispute baselines and fleet turnover assumptions in those tables. AP’s CAFE package cites higher NOx, VOC, and soot projections under a softer mileage path. Those precursors drive ozone and particulate health impacts.

Those precursors drive ozone and particulate health impacts.

AP’s cited projections link softer CAFE to higher smog precursors and soot.

Beyond carbon dioxide, Associated Press reporting flags additional nitrogen oxides, volatile organic compounds, and soot under a weaker CAFE path — precursors that drive ozone and particulate problems atmospheric chemists track separately from climate CO2. Industry analyses may still dispute the baselines and fleet-turnover assumptions inside those tables.

Urban downwind communities often see the chemistry first. Climate and clean-air statutes interact but are not identical, a distinction litigators will mine even when headlines blur them. Monday’s final-rule technical support document should be checked for the agency’s own precursor tables once the package posts.

Ozone-season planners in downwind metro counties already model extra VOC and NOx tons when fleet MPG targets soften, so Monday’s CAFE technical tables matter as much to air-district staff as to Detroit powertrain leads.