Air Pollution
Delhi rolls out GRAP IV vehicle curbs as AQI hits 358 amid fog chaos
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Following Tuesday's announcement, Delhi enforced the entry ban on non-BS-VI private vehicles from outside the city and 'No PUC, No Fuel' rule on December 18, 2025. AQI soared to 356-358 in 'very poor' category amid dense fog slashing visibility to 100m, disrupting flights and trains, though winds may aid dispersion later.
Nearly one in 10 homes tested in the UK, Italy and the Netherlands showed benzene levels from gas cooker leaks that surpass safety limits, according to researchers. The cancer-causing chemical in natural gas poses risks akin to secondhand smoke indoors. The findings highlight potential indoor air pollution from slow leaks.
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Black rain fell on Iran's capital Tehran following US-Israeli strikes on oil facilities on 7 and 8 March. The strikes ignited fires that produced thick smoke, leading to health concerns among residents. Scientists warn of potential environmental and health risks from the polluted precipitation.
Following the December 18 launch of 'No PUC, No Fuel' and entry bans for non-BS-VI vehicles, Delhi Traffic Police inspected 2,768 vehicles at borders, turning back 460 non-compliant ones and issuing 289 challans amid air pollution fight. Limited checks at Badarpur allowed some entries unchecked.
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The Delhi government has barred vehicles without a valid pollution under control (PUC) certificate from buying petrol and diesel at fuel stations starting December 18 to curb air pollution. Environment Minister Manjinder Singh Sirsa announced this on Tuesday, as the city's air quality index stood at 329 in the 'very poor' category on Wednesday morning. The measure aims to control vehicular emissions, including restrictions on non-BS-VI compliant vehicles from outside Delhi.
Attacks in the Red Sea forced ships to detour around the Cape of Good Hope, creating a natural experiment that revealed how cleaner marine fuels reduce cloud formation. Researchers found that low-sulfur fuels cut the cloud-boosting effect from ship emissions by about two-thirds. This discovery helps refine climate models and highlights trade-offs in pollution regulations.
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Delhi and the NCR region marked the 13th consecutive day of hazardous air on November 26, 2025, with the city's AQI recorded between 337 and 373, categorized as very poor to severe. Particulate matter levels dipped slightly but stayed well above WHO limits, amid forecasts of no rain to clear the smog. NCR cities like Noida and Gurugram also reported high pollution indices.
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