大気質
CAMe declares phase 1 environmental contingency in CDMX and Edomex due to heat wave
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The Environmental Commission of the Megalopolis (CAMe) declared Phase 1 Environmental Contingency on Saturday, April 25, in Mexico City and Mexico State due to high ozone levels from a heat wave. Expanded vehicle restrictions apply today, Sunday, April 26, under the Double Hoy No Circula program from 5:00 to 22:00. Temperatures in CDMX will reach 30 to 32 degrees Celsius.
シカゴ市は、市内全域に277個のセンサーを設置し、全米最大規模となるコミュニティ型の大気質監視システムを導入した。このネットワークは、マイノリティ居住地域における工業汚染をめぐり2021年に提起された市民権侵害の申し立てに端を発している。
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Jakarta's air quality ranked second worst globally on Wednesday morning according to IQAir data. The air quality index stood at 175 with PM2.5 concentration at 88.5 micrograms per cubic meter. Lahore in Pakistan held the top spot with an index of 382.
The Comisión Ambiental de la Megalópolis (CAMe) has decided to maintain Phase I ozone air contingency in the Mexico City Metropolitan Area on Saturday, February 14, 2026, marking the third day of vehicle restrictions due to poor air quality. The peak ozone level recorded was 156 ppb at the Atizapán station in the State of Mexico. Authorities attribute the situation to a high-pressure system that promotes pollutant accumulation.
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Mexico City and the State of Mexico avoided an environmental contingency and double Hoy No Circula for Thursday, February 12, thanks to wind gusts that improved air quality on Wednesday, February 11. The Metropolitan Environmental Commission reported ozone levels of 156 ppb in Coyoacán, but cloudiness and wind quickly reduced pollution. The Hoy No Circula program will operate normally on Thursday.
In neighbouring Hebei province, rural residents say they cannot afford to heat their homes enough after switching from coal. Daytime temperatures in northern China often stay below freezing this winter, leaving many rural villagers with little choice but to endure the cold.
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The Environmental Commission of the Megalopolis suspended the ozone environmental contingency in Mexico City and the State of Mexico on Friday, January 9, 2026, due to improved air quality. This avoids the Double Hoy No Circula for Saturday, January 10, which will operate normally. Pollutant concentrations decreased thanks to favorable weather conditions.
科学者らが世界中の大気中に広がるシリコーン汚染物質を特定
2026/04/24 11:48大気中のマイクロプラスチック、陸域からの排出が海洋の20倍超
2026/04/11 20:43科学者らがオクラホマ州で大気中のMCCPを初めて検出
2026/03/13 13:07Authorities forecast up to 15 days of double Hoy No Circula due to heat waves in Mexico Valley
2026/03/11 05:23Johannesburg faces return of sulphur odour amid pollution concerns
2026/02/10 06:02メタン濃度が2020年代初頭に予想外に急増
2026/01/30 11:29Delhi logs second-best January air in five years with AQI of 307
2026/01/27 17:06Delhi sees wettest January in four years with increased chill
2026/01/24 17:50Delhi's AQI reaches moderate level after rain and winds
2026/01/13 11:36科学者らが都市部の空気中に大量のプラスチック粒子を発見