Something interesting I have learned in class...

In chapter 1, I learned that there are renewable and non-renewable natural resources. Of those resources, it is the non-renewable resources that we need to worry about because they are being depleted faster than they can be replenished due to our excess use. Some examples of these are coal, minerals and fossil fuels. It is a pitty that many people think, "If I don't use or pollute it, someone else will." This is known as Tragedy of the Commons and is the basic idea that unrestricted use of a resource dooms that resource to overexploitation. In the U.S. alone, we use 25% of the earth's natural resources which, clearly, we are not 25% of the earth's population.

http://www.thedailygreen.com/environmental-news/latest/6628