If I can invent something new, I would like to produce time machine, because time machine will tell us our future in advance and from the information, we can improve our actual situation by correcting our present way of doing things.

 

 Prediction of something is very important for us to take our right course.  For instance, yesterday, I had my sawing machine examined whether or not it is out of order.  Although I did imagine the sawing machine was flawless, because I seldom use it  the mechanic scrutinizing it,  said that there was a broken part and if only the part is replaced as normal one, the machine would function. however, it was such an old type of machine that they cannot prepare the important part of the sawing machine.  After all, my nearly new sawing machine could not use any more.  I regret not using it frequently, which might have let me notice its abnormal function more early.   If I had time machine, I could go to past world and worn what I was that I should check the sawing machine immediately.

 

  This is not only my case.  Time machine will be useful for us to improve our world.  By going to the future, we would be able to see what our future world would be like.  Now, environmental problems are aggravating and increasing population and wasting materials are accelerating depletion of precious natural resources,   If we see the situation of our future world is devastating, we could settle down to prevent the situation by every means, like trial of reducing the amount of  resource consumption, and discharged harmful materials, cause of environmental destruction, instead of continuing to live in the present mass consumption society.  In order that we really make an effort to solve the series of problems, we need to recognize the crisis from the certain and terrible information about the future. 

 

In this way, time machine will not only give us personal advice but also more influencial predicts about our future world.  Of course what we can gain from the time travel must shock us, but it is necessary for us to face the severe reality of our problems and to tackle it very hard so as to improve the situation.