Severe Winter Ozone Pollution Linked to Petrochemical Emissions

13 Jan 2025 CW Team

A recent study has revealed that severe wintertime ozone (O3) pollution, typically associated with warm weather, is being driven by alkene emissions from local petrochemical industries in Lanzhou, China. Researchers from the Hong Kong Polytechnic University discovered alarming O3 levels in the cold winter months of January 2018, with concentrations exceeding 100 parts per billion (ppbv) and peaking at an alarming 121 ppbv. This is contrary to the traditional belief that O3 pollution mainly occurs during hot weather with strong solar radiation.

The team used an advanced photochemical box model to simulate photochemical smog at the urban scale, identifying alkene ozonolysis as the main contributor to O3 formation. Unlike the typical radical sources initiated by sunlight, the alkene reaction occurs without sunlight and produces reactive radicals that accelerate O3 production. Alkenes, particularly trans/cis-2-butene and propene, contributed to nearly 90% of the O3 levels during the pollution episodes.

The study highlights the need for targeted mitigation strategies, suggesting that reducing alkene levels by 28.6% or nitrogen oxides by 27.7% during early afternoon hours could significantly reduce O3 levels. The authors stressed the importance of taking action in industrial regions to reduce these harmful emissions.

Long-term exposure to high O3 levels can damage respiratory tissues, causing inflammation, irritation, and exacerbating asthma symptoms, posing serious health risks to the local population.

Infrastructure Urban

13 Mar 2026

Implementation Status of Jal Jeevan Mission

Since August 2019 the Government has implemented Jal Jeevan Mission to provide assured potable water through household tap connections in rural India. At the start of the mission only 32.3 million (mn) rural households, representing 16.7 per cent, were reported to have tap water connections. States and union territories have reported that 125.8 mn additional rural households have since been provided with tap connections. As a result, of about 193.6 mn rural households roughly 158.2 mn, or 81.71 per cent, are reported to have tap water supply at home.\n\nThe State, district and village level st..

Jal Jeevan Mission Reaches Eighty One Per Cent Rural Coverage

The Government reported substantial progress under the Jal Jeevan Mission, launched in August 2019 to provide tap water to every rural household. At launch only 32.3 million (mn) rural households had tap connections and states and Union territories reported provision of 125.8 mn additional households by March 2026. Consequently, out of about 193.6 mn rural households around 158.2 mn, or 81.71 per cent, are reported to have tap water at home. The Finance Minister announced extension of the mission until 2028 in the 2025-26 budget speech. The Swachh Bharat Mission Grameen, launched in October 20..

Empowering Local Governance for Sustainable Rural Water Supply

The Ministry of Jal Shakti has aligned the Jal Jeevan Mission (JJM) with the 73rd Amendment to strengthen village level planning and community ownership of water supply. Gram Panchayats, village water and sanitation committees and Pani Samitis are to plan, implement, manage and maintain piped water systems, with gram sabha processes formalising handover and oversight. Implementation support agencies including non government organisations, community based organisations and self help groups have been empanelled to train local committees and promote women participation. Under JJM, the department ..