The process of electric discharge between clouds and the earth or between different clouds causes _____________.
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Which of the following fuels causes minimum environmental pollution?
Which of the following was India's first interplanetary mission?
Which of the following sources has the largest share in power generation in India?
Which is the largest organ in human beings?
The large collection of stars, dust and gas held together by gravitational attraction between components is known as
Why do the plant closes stomata when it does NOT need carbon dioxide for photosynthesis?
Equus burchellii is the scientific name of _______.