Or, are you asked to prepare a speech on mobile phone is a boon or bane? Here is a debate my son used for the debate competition in his school.
This article covers both sides of the debate.
Like every coin has two sides, it was science that gave birth to destructive weapons like dynamite, guns, rifles, rockets, atom bombs and hydrogen bombs. It was science that gave electric power and nuclear power. If nuclear power was used for peaceful purposes, there is no need to fear. But after all it is human to err. Can anyone say that there is no chance of the destruction of a Hiroshima or a Nagaski being repeated? If that happens, will not science be a bane to humanity? Leaving that part, another creation of science is pollution of the environment.
K + 12 Education Program : A Boon or A Bane | exegesis
Industrialization with the aid of science has polluted air, water, food and the atmosphere. The ozone layer is giving threatening signals. So, here is a case for us to consider science as a cause of ruin. Humans have always been able to conquer and take control of all other creatures in the world. So, let us believe that our wisdom will prevail and that we can reason out for the well-being of our planet. When the universe reveals more secrets to man by means of science, there is hope that the present man will soon become a superman and eventually science would only be a boon and not a bane of his life.