Recovering Ecosystems Define the Problem: Figure out who has a problem, what it is, and why it needs to be solved.
Define Sub-Problems: Break your main problem down into smaller, easier to solve sub-problems.
Determine the Criteria: Decide what conditions would need to be met for the problem to be considered "solved."
Determine the Constraints: Determine what limitations are in place before any solution is considered.
Prioritize the Criteria and Constraints: Put the criteria and constraints in order from most important to least important.
Generate Solutions: Brainstorm, evaluate and refine your ideas, and choose the best solution from your list of priorities.

For the strategies below, decide whether they are best described as demand-side solutions or supply-side solutions to meeting human needs for fresh water. remember that a demand-side solution reduces demand for fresh water, whereas a supply-side solution increases the supply of fresh water. (a) damming a river to create a reservoir (b) desalinating seawater (c) a nation invading a neighboring country to access their rivers (d) raising water prices for consumers and businesses (e) providing tax breaks for companies that use less water (f) replacing inefficient irrigation with more-efficient drip irrigation to grow crops (g) requiring low-flow showerheads in all new homes