Sumitmpsd / CC BY-SA 4.0 Health Air pollution in Delhi The government of Delhi, India, introduces stricter pollution controls, including double parking fees, remote work arrangements, restrictions on high-emission vehicles, and bans on dust-producing construction, as PM2.5 levels reach 201 micrograms per cubic metre. 17:14
Health The United States Food and Drug Administration approves the first generic version of lenacapavir, a twice-yearly HIV prevention injection expected to cost about US$40 annually in 120 low- and middle-income countries. 2 Nov
Health 2025 in climate change The World Meteorological Organization reports that global concentrations of carbon dioxide, methane, and nitrous oxide reached record highs in 2025, with carbon dioxide averaging 426.8 parts per million. 27 Oct
