For the outline you need a title (Not a title page) about one environmental issue, little introduction, sections of the paper (how the paper will be laid out) and a list of the references related to the paper (5 references, the textbook must be included) and you can add later more references (examples of references you find it on Lecture one, Chicago style).
One and a half or two single-spaced pages is enough just to show that you have done some research and found references related to your paper.
choose your topic out of these: Human Impact in Many Ways-
* species decline
*sea level
* Changes like these have triggered climate change, soil erosion, poor air quality, and undrinkable water.