Beyond CO2, modelers warn looser fuel-economy standards can mean higher NOx, volatile organic compounds, and particulate emissions over the life of the fleet — precursors and components that drive ozone and soot in cities. Those are public-health chemistry problems as much as climate ones.

Meteorology still decides day-to-day AQI; standards decide the baseline inventory. That is why environmental groups timed their criticism to the final rule week.

Local air districts may need tighter other controls if federal vehicle rules ease. Specialty climate-chemistry item.

Outlets agree Flight 14’s orbital success and the CAFE emissions debate are the week’s twin physical-science leads.

Space coverage is largely celebratory on milestones; climate coverage splits on the CAFE rule’s emissions math.

Named reporting on this item includes Ars Technica, Space.com, and Associated Press. Prefer those links and primary documents over undated social clips when details shift.

Emission modelers link looser CAFE to higher NOx, VOC, and soot. Cities with ozone problems are the focus.

Forecast and climate-policy cards update when agencies publish new numbers; treat long-range outlook language as provisional until the next official product.

Cross-check any sudden claim against the 3 outlets already attached (Ars Technica, Space.com, Associated Press) before resharing it.

Details on this Science & Climate item can still move during Tuesday dayparts; prefer the linked outlets when a number or meeting time changes.

If a midday update revises a figure, match it across at least two independent outlets before treating a single post as settled.

Keep primary documents and box scores ahead of undated social clips when the facts are still settling.