perfectly maintained. Then why do we fail to keep our environment clean; maintenance of which is far more vital as compared to our home? The term pollution means addition of any substance which alters the quality of the environment. Substances which cause pollution or alter the natural quality of the air‚ water and soil are called pollutants. Hence‚ pollution may be defined as the ‘contamination of the environment that causes harm to the health and survival of humans and other living organisms’. Therefore
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Pollution‚ we hear it every other day at school‚ college and read about it in newspapers. So what is it? Pollution occurs when pollutants contaminate the natural surroundings; which brings about changes that affect our normal lifestyles adversely. Pollution occurs in different forms; air‚ water‚ soil‚ radioactive‚ noise‚ heat/ thermal and light. Every form of pollution has two sources of occurrence; the point and the non-point sources. The point sources are easy to identify‚ monitor and control
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Daly‚ A. and P. Zannetti. 2007. An Introduction to Air Pollution – Definitions‚ Classifications‚ and History. Chapter 1 of AMBIENT AIR POLLUTION (P. Zannetti‚ D. Al-Ajmi‚ and S. Al-Rashied‚ Editors). Published by The Arab School for Science and Technology (ASST) (http://www.arabschool.org.sy) and The EnviroComp Institute (http://www.envirocomp.org/). Chapter 1 An Introduction to Air Pollution – Definitions‚ Classifications‚ and History Aaron Daly and Paolo Zannetti The EnviroComp Institute
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Pollution is the introduction of contaminants into the natural environment that causes adverse change. Pollution can take the form of chemical substances or energy‚ such as noise‚ heat or light. Pollutants‚ the components of pollution‚ can be either foreign substances/energies or naturally occurring contaminants. Pollution is often classed as point source or nonpoint source pollution. Air pollution has always accompanied civilizations. Pollution started from the prehistoric times when man created
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Pollution is the introduction of contaminants into the natural environment that cause adverse change.Pollution can take the form of chemical substances or energy‚ such as noise‚ heat or light. Pollutants‚ the components of pollution‚ can be either foreign substances/energies or naturally occurring contaminants. Pollution is often classed as point source or nonpoint source pollution. Pollution is nothing but "too much of something at wrong place" and environmental pollution is generally defined
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WHAT IS POLLUTION? Explain the term “pollution’’. Pollution is the introduction of contaminants into a natural environment that causes instability‚ disorder‚ harm or discomfort to the ecosystem i.e. physical systems or living organisms. Pollution can take the form of chemical substances or energy‚ such as noise‚ heat or light. Pollutants‚ the components of pollution‚ can be either foreign substances/energies or naturally occurring contaminants. Pollution exposes all people to risks of disease
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Pollution Introduction Pollution is the introduction of contaminants into the natural environment that cause adverse change.[1] Pollution can take the form of chemical substances or energy‚ such as noise‚ heat or light. Pollutants‚ the components of pollution‚ can be either foreign substances/energies or naturally occurring contaminants. Pollution is often classed as point source or nonpoint source pollution. The Blacksmith Institute issues an annual list of the world’s worst polluted places. In
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All kinds of rocks contain very small amounts of radioactive elements‚ these are unstable and they break down into more stable atoms over time‚ which is called radioactive decay. Scientists can tell how old a rock is by using radiometric clocks‚ or by looking at its absolute age. Geologists measure the amount of certain radioactive elements; as time passes the radioactive elements change at regular rates‚ into non-radioactive elements. The older a rock is the larger the number of elements. The age
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considered to be non-active may possess radioactive isotopes having almost identical chemical properties [1]. Radioisotopes are atoms with a nucleus that is seeking a more stable configuration by emitting radiation. Scientists have learned that more radioisotopes could be created by subjecting certain elements to radiation inside a nuclear reactor or bombarding them using a particle accelerator [2]. Nuclear medicine uses very small amounts of radioactive isotopes‚ or tracers‚ to diagnose
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great magnitude; one of them is pollution. Pakistan is one of the developing countries which are sustaining the pollution problem.Traffic congestion is one of the main causes of air pollution. The usage of old transports is ruining the situation. No prevailing laws are strictly implemented‚ as a result‚ factories exude their smoke into the air. Simultaneously‚ wasted poisonous substances are excreted in the water of rivers and lakes which is causing water pollution. The conditions exacerbate in the
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