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There are two main sources of pollution:
(1). Natural Sources:
(a) Volcanic ash
(b) Marsh gas (CH4) released from decay of organic matter.
(c) Dust from dust storm.
(d) Pollengrains, spors, bacteria, cysts etc.
(2). Anthropogenic sources:
Man has aggravated the problem of pollution by his innumerable activities like.
(a) Industrialization
(b) Revolution in automobile industry
(c) Deforestation
(d) Nuclear explosion
(e) Over exploitation of natural resources.
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elementatr cannal and feeding mechenism
by our eyes we can see the beautiful world but is there anything in our eyes which makes it beauiful??
How are a hypothesis, a prediction, and an experiment related? A prediction is a statement made in advance that declares the results that will be get from testing a hypothesis
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