Mercury is the _______ planet from the Sun.
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Which of the following gas contributes the maximum to the phenomena of global warming?
___________ is the process of restoring a forest that once existed but was removed at some point of time in the past.
Which of the following is not a commercial source of energy?
Triton is the moon of which planet?
The space shuttle which took Sunita Williams beyond earth was
Chernobyl disaster is the result of pollution by_____________
The phenomena of raising the outer edge of the curved roads above the inner edge to provide necessary centripetal force to the vehicles to take a safe turn is called _____.