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ENVIRONMENTAL SCIENCE

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Once upon a time, the greenhouse effect was responsible for making a conducive environment for life to exist on the earth. That is by preventing atmospheric temp falling to subzero. The theoretical average temp of the earth without global warming gases would have been (I) -----------------.

But now it is (II) ------------------.

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In the famous Rio de Janeiro Earth Summit 1992,

after much deliberations, arguments and bargain, USA won its key demand. What

was that?

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On January 19, 1991 in Persian Gulf, about

380-520 million gallons of oil spilled to the ocean. That was the worst oil

spill in history. Choose the option that

gives the correct fact about that oil spill.

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International Day for the preservation of Ozone

layer is:

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Which option gives the correct composition

(approximately) of the air (% by volume).

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Many scientists believe that, life was brought

to the earth by comets. Why?

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Choose the option giving the WRONG information

pertaining to Ozone Layer Depletion.

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Why is it very difficult to capture CO2

from the flue gas from thermal power plants or furnaces or boilers?

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Ocean circulation is slow compared to the

atmosphere. However, the movement of heat across the oceans is very large (and hence

significant in the climate system). Why?

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Practically, it is very difficult to control the

marine algal blooms (red tides) directly. Biological control of the algal blooms using predators like zooplankton, etc, is not considered as a good option. Why?

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