Industries pollute the environment through: 1. Air Pollution: It happens due to the high proportion of poisonous gases in the air like carbon monoxide. Air-borne particulate matters, smoke, toxic gas leaks etc. cause pollution. It affects humans, animals, plants, and atmosphere as a whole too. 2. Water Pollution: Organic and inorganic industrial wastes and affluent that are dumped into water bodies cause water pollution. Some main factories that cause it are paper. chemical. textile etc. Harmful substances include dyes, acids, fly ash etc. 3. Thermal Pollution: It happens when hot water is released into rivers and ponds without cooling. It adversely affects the aquatic life. 4. Land pollution: Solid waste material like glass, packaging and renders reduce the quality of the soil. Rain water carries the chemicals underground and pollutes ground water too. 5. Noise Pollution: Industrial work, construction process, machinery and various equipments create a lot of noise. It can be a cause of irritation and stress. It can also create health problems like increased heart rate and blood pressure.