Choose any man made invention(any man-made invention) and speak on how it has affected the societies (its benefits and demerits).speak for 2-3 minutes....
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steam engine.it affects the man's life by reducing the time.if we want to go out from a place to a place long we use it.before we used to go out by walking but now it reduces and saves our time.Thank You
ranjanakaupranjana:
demerits?
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