Answer each of the following questions in 100 words response. Be sure to provide references for the sources you use.
1. Why can it be difficult to identify the boundaries of an ecosystem? How can environmental scientists resolve this boundary issue when studying an ecosystem?
2. Why is understanding the cycling of matter and energy in ecosystems important to environmental science? Provide an example.
3. Explain how human impact can cause pollution and disease in ecosystems. What are some solutions and treatments to solve these impacts, especially in water?