The students of Kashmir Model Academy are presenting on pollution. Pollution is defined as when harmful substances contaminate the environment. There are three main types of pollution: air, water, and land. Air pollution is a mixture of particles and gases in the atmosphere from sources like vehicle emissions, factory chemicals, and smoke. Water pollution is the contamination of water sources that makes water unusable. Land pollution results from unsustainable agriculture, improper waste disposal, mining, and illegal dumping. The presentation emphasizes that pollution poses serious threats to human health if not addressed.