The level of pollution in Delhi has definitely reduced after the monsoon rains, but the government is considering cloud seeding i.e. artificial rain to give relief to the people from pollution. Globally, work on cloud seeding has been ongoing since the 1940s. It is a scientific method of making rain. In this, small aircraft are flown through the clouds and silver iodide, dry ice and chloride are released into the air. Due to this, water drops freeze in the clouds. These drops fall on the ground as rain. Artificial rainfall is much stronger than normal rainfall and its effect also lasts for a long time. The use of artificial rain has raised new hopes for dealing with problems such as drought, heat and floods. Many countries including India have done this work. But this has not given much success in removing pollution because unless the local causes of pollution are removed, the problem will not be solved. Artificial rain will clear the pollution for a day, but it will happen again. IIT Kanpur suggests artificial rain in Delhi. He has been working on it for more than five years. However, in the year 2018 too, preparations were made for artificial rain to relieve Delhi from air pollution. Then a special plane of ISRO was also taken and permission was also taken from the Directorate General of Civil Aviation (DGCA), but at the last moment the clouds cleared. As it was expected that heavy clouds will cover Delhi on November 21, it did not happen. As a result, the entire plan of artificial rain was ruined. According to scientists, artificial rainfall requires special weather conditions. Cloudiness and moisture in the air is essential. Also, favorable winds should also be present. That rain fell in July in a very small proportion. Due to Monsoon, there were all three at that time wind, cloud and moisture. Delhi receives very little rain during November. Seasonal precipitation occurs when air is warmed by the sun's heat, becomes lighter, and rises. Rising air pressure decreases and after reaching a certain height in the sky, it cools. When this air becomes more dense, the raindrops become too large to hang in the air, then begin to fall as rain. This is called normal precipitation, but in artificial precipitation, such conditions are technically man-made. The World Meteorological Organization said in a 2017 report that more than 50 countries around the world have tried artificial rain technology. These include China, the US, Russia, Australia and Japan. In 2008, China used a 'weather modification system' to preemptively rain during the Beijing Olympics to prevent rain from spoiling the Games. China has planned to bring 5.5 million square kilometers of the country under artificial rainfall by the year 2025. Japan also used this technique during the Tokyo Olympics and Paralympics. A year ago there was so much rain in the UAE that a flood-like situation arose. The Thai government's plan aims to green the drought-stricken areas. But according to many scientists, this tampering with the environment can prove to be dangerous. Not only will this create environmental imbalances, but seawater may become more acidic. Then, there is also the danger of depletion of the ozone layer and increase of carbon dioxide. Silver iodide used in artificial rain is harmful to plants and life. Therefore, it is necessary to proceed in this direction only after various discussions.