Air pollution from World War II production. Pollution v • d • e Air pollution Acid rain • Air Quality Index • Atmospheric dispersion modeling • Chlorofluorocarbon • Global dimming • Global warming • Haze • Indoor air quality • Ozone depletion • Particulate • Smog Water pollution Eutrophication • Hypoxia • Marine pollution • Ocean acidification • Oil spill • Ship pollution • Surface runoff • Thermal pollution • Wastewater • Waterborne diseases • Water quality • Water stagnation Soil contamination Bioremediation • Herbicide • Pesticide • Soil Guideline Values (SGVs) Radioactive contamination Actinides in the environment • Environmental radioactivity • Fission product • Nuclear fallout • Plutonium in the environment • Radiation poisoning • Radium in the environment • Uranium in the environment Other types of pollution Invasive species • Light pollution • Noise pollution • Radio spectrum pollution • Visual pollution Inter-government treaties Montreal Protocol • Nitrogen Oxide Protocol • Kyoto Protocol • CLRTAP Major organizations DEFRA • EPA • Global Atmosphere Watch • Greenpeace • National Ambient Air Quality Standards Related topics Environmental Science • Natural environment Pollution is the introduction of contaminants into an environment that cause harm to human health, other living organisms, and the environment.[1] Pollution can be in the form of chemical substances, or energy such as noise, heat, or light. Pollutants can be naturally occurring substances or energies, but are considered contaminants when in excess of natural levels. Pollution is often categorized into point source an nonpoint source pollution.