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How many types of health hazards are there?

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in Energy Management by (679k points)
How many types of health hazards are there?

(a) One

(b) Two

(c) Three

(d) Four

I have been asked this question in an international level competition.

Question is taken from Environment and Human Health topic in section Human Population and the Environment of Energy Management

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Correct choice is (c) Three

For explanation I would say: The three types of health hazards are physical hazards, chemical hazards and biological hazards. Physical hazards are global warming, UV radiations, Radioactive etc. Chemical hazards are combustion of fossil fuels, pesticides, heavy metals etc. Biological hazards are bacteria, viruses etc.

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