Hi James: Sounds like a political subject to me...
Not sure if you attend a secular school or not, but if you do, and you want to be suspended or expelled, you can present to them the account of God's creation. Or, you can convey to them that one of our former VP's (I won't mention his name) who is so concerned about global warming, has one of the largest so-called carbon footprints around...

So much for the satire...
It's amazing to me how God created all that is seen and unseen, James. He gave us dominion over much of His creation, and yes, we all need to be good stewards of His earth.
As we should be good stewards of our bodies, the temple of the Holy Spirit. God filled the earth with a flood and destroyed everything except Noah, his family and the animals on the ark. Even after all that destruction, the earth He created survived and was "Healed," if you will... That "ONE EARTH-IT'S ALL WE GOT," survived because it is GODS earth, and His power and glory keep it going. God's voice of thunder shook the mountains and the very foundation of this earth He created, and it's still in good shape!
I would not be surprised if this subject your teacher selected will turn into a political debate. You likely already have some ideas that you will present, and the input from the members of this site are excellent! My personal opinion... Be objective with "Common-sense" ideas of how we can conserve energy, etc., and I would present my personal conviction to the class that my "Faith" convicts me of the fact that we all need to be responsible and appreciative of what we've been given for our use and pleasure. For if we are truly appreciative of what we've been given, we will care for it in a prudent manner.
And living a life with works that show what our faith is, will make others wonder why we are different. People are curious, and what a great way to witness, when someone who is curious, asks you why you are different... Sharing the gospel of our Lord, the free gift of redemption, through our faith in Christ. Being a messenger is simple, James. It sure sounds like you are seeking the Lord, and He loves you so much, and yearns to have an intimate relationship with you every day! He will never let you down my friend. God bless you, and we'll remember you in our prayers that God will guide you with this assignment.