DEFINE POLLUTION AND POLLUTANT?
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pollution is the effect of undesirable changes taking place in our surrounding which affect the living organisms. The substance, which causes pollution, is known as pollutant. Every substance is present in environment naturally in a fixed amount. Whenever concentration of any substance exceeds its natural abundance, it becomes a pollutant for the environment. Pollutants can be solid, liquid or gaseous substances present in greater concentration than it’s natural abundance and are produced due to natural or human activities. Every pollutant has a threshold limit value (TLV) which is the permissible limit of a pollutant in atmosphere to which a person is exposed during hours a day or 40 hours a week for life time without any adverse effects. TLV are determined by experimentation on animals, by use of medical knowledge, epidemiology surveys & environmental studies.
Today environmental pollution is one of the most serious problems in front of us. In last few years, we have achieved lots of success in field of science and technology which resulted in industrialization and modernization. For this, natural resources were used excessively and we forgot to think about the harm which we were causing to our environment. By end of the 20th century, the level of pollution in environment was very high. Now, it’s time to take steps in order to repair the damage which we have already done to our environment and also to prevent further damage. This makes it very important to have s systematic study of the environment and application of science and technology to overcome this problem.
Pollutants
?Pollutant is any substance already present in environment or a new substance whose concentration increases to undesirable proportions causing danger to living organisms or other materials.Pollutants are the substances which cause pollution. Pollutants can be physical or chemical. They can be waste matter that contaminates the water or air or soil. Pollutants cause pollution when they are in greater amount than the natural abundance. Pollutants alter the physical and chemical composition of air, water and soil that are not feasible for organism and plants. A pollutant may change growth rate of plant or animal species, or interfere with human amenities, comfort and health. Pollutants not only harm the living organisms but also to the property. For example acid rain causes harm to marble buildings.
Today environmental pollution is one of the most serious problems in front of us. In last few years, we have achieved lots of success in field of science and technology which resulted in industrialization and modernization. For this, natural resources were used excessively and we forgot to think about the harm which we were causing to our environment. By end of the 20th century, the level of pollution in environment was very high. Now, it’s time to take steps in order to repair the damage which we have already done to our environment and also to prevent further damage. This makes it very important to have s systematic study of the environment and application of science and technology to overcome this problem.
Pollutants
?Pollutant is any substance already present in environment or a new substance whose concentration increases to undesirable proportions causing danger to living organisms or other materials.Pollutants are the substances which cause pollution. Pollutants can be physical or chemical. They can be waste matter that contaminates the water or air or soil. Pollutants cause pollution when they are in greater amount than the natural abundance. Pollutants alter the physical and chemical composition of air, water and soil that are not feasible for organism and plants. A pollutant may change growth rate of plant or animal species, or interfere with human amenities, comfort and health. Pollutants not only harm the living organisms but also to the property. For example acid rain causes harm to marble buildings.
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POLLUTION: A population is the number of living things that live together in the same place. A city's population is the number of people living in that city. These people are called inhabitants or residents.
POLLUTANT: A pollutant is a substance or energy introduced into the environment that has undesired effects, or adversely affects the usefulness of a resource.
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POLLUTANT: A pollutant is a substance or energy introduced into the environment that has undesired effects, or adversely affects the usefulness of a resource.
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