3. What is Pollution? considered contaminants when in excess of Pollution is the introduction by man into the environment of contaminants that cause harm or discomfort to humans or other living organisms, or damage 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 natural levels. Pollution is often categorized into point source and nonpoint source pollution .
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5. Different tpyes of Pollution. Air pollution is a mixture of solid particles and gases in the air. Car emissions, chemicals from factories, dust, pollen and mold spores may be suspended as particles. Ozone , a gas, is a major part of air pollution in cities. When ozone forms air pollution, it's also called smog. Water pollution is a large set of adverse effects upon water bodies such as lakes , rivers , oceans , and groundwater caused by human activities. Although natural phenomena such as volcanoes , algae blooms , storms , and earthquakes also cause major changes in water quality and the ecological status of water, water is only called polluted when it is not able to be used for what one wants it to be used for. Water pollution has many causes and characteristics. Increases in nutrient loading may lead to eutrophication
6. Land pollution is the degradation of earth's land surfaces often caused by human activities and its misuse. Haphazard disposal of urban and industrial wastes, exploitation of minerals, and improper use of soil by inadequate agricultural practices are a few of the contributing factors.[1] Also, increasing urbanization , industrialization and other demands on the environment and its resources is of great consequence to many countries. Land pollution
