Summarize the main idea of a reading, create visual aids, and come up with new questions using a Four Square Concept Matrix.
To keep the Mono Lake ecosystem healthy, the City of Los Angeles has steep regulations on how much water it can divert from the basin. Los Angeles has made up that much water and more from conservation measures.
Water in Yosemite runs down creeks, rivers and waterfalls; the rivers flow into the Central Valley where they are used for irrigation or municipal purposes. Conserving water keeps water available for wilderness.