Diesel emergency talks, Brazil deforestation drop, Mumbai sea level fears: Oct 2 2026 climate news roundup

This week's Carbon Brief roundup covers emergency talks among European countries after the US threatened to cut off diesel supplies unless stockpiles are released. The dispute has global fuel price implications, while the US also weakened car fuel-efficiency standards and faces a lawsuit from 25 states over power plant emissions limits. In Brazil, new analysis finds at least 20,000 square kilometers of Amazon forest remain standing thanks to Lula's policies since 2022, a key issue ahead of the country's election. Meanwhile, a UN report warns that Mumbai faces permanent inundation risk, and the city has commissioned a new sea level vulnerability assessment. Other items include a WTO dispute panel on the EU carbon border levy, a UK government-backed grid investment body, and research on marine heatwaves, wildfire exposure, and youth climate perceptions.