The progressive warming up of the earth's surface is mainly due to:
automobile exhaust
blanketing effect of carbon dioxide in atmosphere
reforestation
thickening of ozone layer
A
blanketing effect of carbon dioxide in atmosphere
B
automobile exhaust
C
thickening of ozone layer
D
reforestation
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Solution
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This is because carbon dioxide gas (CO2) produced by various activities on earth like combustion of fossil fuel, burning of coal, etc. goes into the atmosphere and makes a thick layer, this layer allows sunlight to enter the atmosphere but does not allow it to exit, the heat gets trapped into the atmosphere and leads to the warming up of the surface.
This is the main reason for warming up the earth's surface.
Hence, option B is correct.
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