The major types of pollution are : 1. Air Pollution: It occurs when the atmosphere is filled with undesirable gases like Sulphur dioxide and Carbon Monoxide. The particles that settle down in the atmosphere are both solid and liquid-like dust, spays mist, smoke. Air pollution adversely affects health and the environment. 2. Water Pollution: When organic and inorganic waste from industries get discharged into the rivers. The industries that increase water pollution are paper, pulp, chemical. textiles and dyeing, petroleum refineries, tanneries, and electroplating industries. 3. Thermal pollution: This occurs when the hot water from the plants, factories are drained into rivers and water bodies before cooling down. This scenario has an ill effect upon the aquatic life. 4. Noise Pollution: The unwanted loud sound from vehicles, industrial and construction activities etc. creates noise pollution. This affects heart rate, blood pressure, stress, and psychological effects etc.