Dunno, how about some classic topics - pollution, the lack of resorces caused by the huge rise of pupulation, less socialising and physical activities because of uber-technology etc. Or did I get your assignment wrong?
I didn't want to do any of the cliche ones like global warming or overpopulation, because everyone knows the ins and outs of them and no one would really pay attention.
After doing mild research I think I'll write about alternative ways to generate energy. The solar roadways are a favorite of mine, you've got to check this out: http://www.worldinfuture.com/solar-r...in-the-future/