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Ecological system ecosystem)

A community of living organisms and theenvironment in which they live, interacting to

form a whole functional system.

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Types of pollutionThere are different types of pollutions some of

them are

1. Air pollution

2. Water pollution

3. Land pollution

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Air pollution Air pollution is not new- it has been with us since the industrial revolution

introduced the world to the belching factory smokestack.

Air pollutants affect the vegetation, decreasing agricultural yields

The most prevalent forms of air pollution, however the gases and particulates

spewed out by industrial processes, which affects the air we breathe.

The six principal of pollutants for which EPA sets national air standards are

carbon monoxide , sulfur oxides, nitrogen oxides , and airborne lead.

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Water pollution Water pollutants today, however, are much more diverse,

consisting not only of organic wastes but also bacteria, viruses

and sediments.

These can destroy aquatic life , threaten human health and foul

the water. About 40% of our surface water of today is too

polluted to swim in.

The high saline levels in ponds , lakes and river kill fish,

vegetation or other organisms inhabit them.

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Land pollution Hazardous substances are those that can cause an increase in

mortality rates that have other seriously adverse health or

environmental effects.

Toxic substances released on land include acidic chemicals,

inorganic metals, flammable solvents , pesticides , herbicides,

explosives, and so on.

Although the health effects of some substances are now

known, the toxicity of many others is unknown and difficult to

determine.

Many chemicals cause chronic diseases only after a longperiod following apersonsfirst exposure to the chemical.

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