How many permanent scientific research stations operate throughout the year in antarctica
30
40
There is a rise in the levels of _____________ due to the burning of fossil fuel
Nitrogen
Carbon dioxide
Reduction in ice cover will threaten the existence of ______________
Krill
Seal
Whale
A major reason for pollution in antarctica is ______________
Pollution
Oil spills
Thinning of stratospheric ozone layer above antarctica is termed as _______________
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