In the next 10 yrs. what will be the next biggest environmental problem facing the world?

In the next 10 yrs. what will be the next biggest environmental problem facing the world? Why do you think so? This is a survey for my science class. I think its going to be global warming... what about you?In the next 10 yrs. what will be the next biggest environmental problem facing the world?definitely global warming - we are already seeing loads of storms and abnormal weather conditions. a massive block of ice is about to drop off a glacier in antartica (not the arctic where everyone is looking). the massive drought in australia has already made lots of farming families bankrupt and having to move to cities.. my point is - it's already happening and the next 10 yrs will be much much worse. we won't run out of fossil fuels in 10 yrs, so i don't think thats it.In the next 10 yrs. what will be the next biggest environmental problem facing the world?I would probably think global warming or oil problems. The gas prices might go up a lot because we are using so much gasoline these days, and will be using more as more people are born. And oil is a non-renewable resource (unless u got a few million years). This might be a good thing because there will be less people buying gas because it is expensive, which will then make car companies go out of business unless the car companies make cars using no gasoline. Which will then mean a little less green house gases. But global warming is not all unnatural. Some of global warming is natural. So we'll just have to hope for the best.

If it matters at all I am 11 years old.

Edit: To prickle13:

So it's just me that's noticing gasoline prices are going way up?In the next 10 yrs. what will be the next biggest environmental problem facing the world?Definetly global warming and over populated countriesIn the next 10 yrs. what will be the next biggest environmental problem facing the world?
renewable energy environment impact; pretrol from antartic; coal reserves exploded.