Describe ecosystems with respect to energy flow, food cycles, pollution, and the impact of man. Using the internet, write an essay on each of the following objectives (essays should be 1-2 pages in length, single-spaced, no larger than 12-point font): Include links to all resources. Only online resources allowed. Please complete this essay at a high school level I have received too many assignments back that were far above high school level that were too good to turn in.