Answers

2015-10-16T10:31:17+05:30
Invention of cell phone towers....because of the radiations produced by the towers the birds are confused to go to their nest.....they get many harmful diseases.....   invention of plastic...it doesn't decompose into the earth...some plastics can't be recycled so if we burn them,they produce harmful smoke;if we bury them, they do not decompose at create some natural disasters.... :) :)
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