Which type of democracy do we follow in India?
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In India, the Air (Prevention and Control of Pollution) Act came into force in 1981, but was amended in ________ to include noise as an air pollutant.
What is the unit of calorific value?
Blood pressure is measured by _______.
The force ultimately responsible for mass movement
Ornithophily is effected by
Depletion of ozone layer causes
The outermost layer of sun is called