Outline19

I. Introduction A. Definitions B. Statistics II. Big Causes A. Erosion 1. Caused by humans 2. Lack of plants B. Overgrazing A. Why we have cows III. Small Causes A. Invasive species B. Mining IV. Halting A. Trees 1. China B. Walls V. Problems with halting A. Too many people B. Developing countries VI. Conclusion A. Good feeling ending