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.
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In _____________ motion of a body its velocity varies with time.
The weight of a boy on the surface of the moon is 300 N. The weight of the same boy on the surface of the earth will be
Which of the following are the smaller planets than the size of the Earth?
Growing agricultural crops between rows of planted trees is known as
Non-green plants lack which of the following?
The outermost layer of the earth's atmosphere is _______.
Haustoria or sucking roots are found in which of the following?