Environmental Pollution 2

Environmental pollution
In this topic we are going to deal about different types of pollution and due to these types of pollution how our environment is facing disasters and calamities.
Introduction:
Environmental pollution can be defined as “the unfavorable alteration of our surroundings”
Types of pollutants:
1. Bio degradable pollutants –decompose rapidly by natural processes.
2. Non-degradable pollutants- do not decompose or slowly decompose in the environment.
Pollutions are different kinds
1. Air pollution
2. Water pollution
3.Soil pollution
4.Marine pollution
5. Noise pollution
6. Thermal pollution and
7. Nuclear hazards.
I-Air pollution:
It may be defined as “the presence of one or more contaminants like dust, smoke, mist and odour in the atmosphere which are injurious to human beings, plants and animals.”
Sources of air pollution:
a) Natural pollution - volcanic eruptions, forest fires, biological decay, etc.
b) Man – made activities – Thermal power plants, agricultural activities etc.
Control Measures:
1. Source control:
a) Use only unleaded petrol.
b) Use petroleum products and other fuels that have low sulphur and ash content.
c) Plant trees along busy streets because they remove particulates and carbon monoxide and absorb noise.
d) Industries and waste disposal sites should be situated outside the city centre.
e) Use catalytic converters to help control the emissions of carbon monoxide and hydrocarbons.
2.Control measures in Industrial centers :
a) Emission rates should be restricted to permissible levels
b) Incorporation of air pollution control equipments in the design of the plant lay out.
II-Water pollution:
It may be defined as “the alteration in physical, chemical and biological characteristics of water which may cause harmful effects   on human and aquatic life.”
Types, effects and sources of water pollution:
1.Infectious agents: - Bacteria, viruses, protozoa and parasitic worms.
Sources: - Human...