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Besides CO2, the other green house gas is
Heat resistant variety of glass is
Muddy water is treated with alum in purification process, itis termed as:
The acid rain destroys vegetations as it contains
The orbital speed of a satellite revolve very near to earth surface is -
What is the most common salt in sea water -
Which of the following has the least penetrating power?
Why clouds are float in atmosphere?
Biogradable wastes can usually be converted into useful substances with the help of:
Heat stored in water vapors is -
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