Watersheds surround reservoirs, conducting the runoff into it. Some precipitation percolates through the soil and is incorporated into groundwater. Evaporation removes some precipitation and returns it to the atmosphere. Estuaries are natural water habitats that are important ecologically, and in preventing floods.

Deserts are unique ecosystems that are home to many threatened and endangered species. The noise, pollution, and speed of off-road vehicles (ORVs) destroy vegetation and cause severe soil erosion and soil compaction, which in turn leads to increased runoff, flooding, and further erosion. The disruption of soil also promotes the spread of invasive nonnative vegetation. In addition, ORVs affect wildlife through direct collisions, habitat fragmentation an alteration, harassment, and sedimentation of streams. Although deserts are not lush, they provide genuine wilderness experiences for many people and their enjoyment will be affected by vehicles.

Green architecture is a sustainable building design which minimizes energy usage and environmental damage. From its landscaping to its internal sensors, the Lews Center for Environmental Studies was carefully crafted for this purpose. 150 environmental sensors were installed throughout the building and landscape to prevent waste. Both active and passive systems are used to heat and cool. The landscaping provides food, captures rainwater, and preserves native species. In addition a comprehensive water treatment system recycles wastewater and solar energy provides lighting. It's clear that students here are able to see environmental science in action, not just read about it in a textbook.