Artificial rains key to reduce pollution
Pollution levels in Delhi usually peak between the end of October and the first half of November. The time, signifying the arrival of winter, is accompanied by a drop in temperature, which also aids the accumulation of pollutants in the atmosphere. On September 12, the Delhi government held an environmental expert meet with experts from 32 organisations and other stakeholders to discuss the winter action plan to fight air pollution. The meeting saw participation from Delhi Pollution Control Committee (DPCC), UNEP, Centre for Science & Environment (CSE), IIT -Kanpur, Clean Air Asia and the Environment department among others. Following the meeting, Delhi environment minister Gopal Rai announced that the Delhi government is considering using cloud seeding technology to create artificial rains in an effort to reduce air pollution in the Capital during winter. The idea of using artificial rain to mitigate air pollution was put forward by a team of experts from IIT-Kanpur. Concept of cloud seeding “Cloud seeding refers to the process of spreading either dry ice or more commonly, silver iodide aerosols, into the upper part of clouds to stimulate the precipitation process and form rain,” explained Manindra Agrawal, professor of IIT-Kanpur, who headed the team which conducted the experiment to check the feasibility of cloud seeding. In an exclusive interview to Patriot, Agrawal said, “If clouds are present and have the required moisture content, artificial rain through the process of cloud seeding is feasible.” Delhi has the required weather conditions during winters, he added. The idea of artificial rain is still in its infancy and requires flight clearance from DGCA and other authorities for security purposes. The estimated cost for such artificial rain would be around Rs 1 lakh per square km, he added. Feasibility of artificial rain If implemented, this would be the first such step in India to combat air pollution. “Madhya Pradesh and Karnataka have experimented with cloud seeding earlier. But those were to deal with droughts. This would be the first case of cloud seeding in India to fight air pollution,” Agrawal said. Cloud seeding was among the many suggestions put forward by experts to combat air pollution. During the meet, 13 hotspots were also identified. The pollution hotspots in Delhi are Anand Vihar, Wazirabad, Vivek Vihar, Wazirpur, Ashok Vihar, Dwarka, Jahangirpuri, Rohini, Bawana, Narela, Mundka, Punjabi Bagh, RK Puram and Okhla Phase 2. All the departments concerned have been asked to submit a separate Winter Action Plan for these 13 hotspots by September 25, 2023. Improved air quality Aam Aadmi Party (AAP) has time and again claimed how air pollution has reduced in Delhi in recent years.
