This is homework *help*. Since you haven't posted any sort of starting point, it looks like you simply want someone to write the paper for you. Not cool.
First of all, you need to figure out what problems you want to address. Please brainstorm a list.
From that list, which ones are susceptible to technological assistance? Note that there are already a number of solutions in place for various ecological applications: alternative fuels, renewable energy sources, and so on.
When you get *stuck*, come back here and post again; we'll help you over the rough spot.
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