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’Harm watch, harm catch' প্রবাদটির অর্থ কী?
A considerable part of the harmful ultraviolet radiation of the sum does not reach the earth surface, because of the fact that, there is a layer of __________ high above earth's atmosphere, which absorbs it.
The gas present in the stratosphere which filters out some of the sun's ultraviolet light and provides an effective shield against radiation damage to living things is
Ultraviolet radiation striking the earth is due to the depletion of
A 'body' which allows the short wavelength incoming solar radiation to enter in, but does not allow long wave length outgoing infra red radiation to escape out is called the
Which of the following is the most lethal water pollutant?
Which is the most lethal weapon ?
Lead exhausted in the atmosphere by automobiles using leaded petrol (i.e. tetraethyl lead for improving octane number) is a lethal air pollutant which causes
Find out the opposite word. LETHAL
The meaning of " LETHAL' is: