Drexel designs toward LEED Silver standards; however, new construction is registered and rated using the Green Globes rating system. The campus features five green buildings. Since 2000, nine existing spaces have been repurposed for alternative use. To conserve water, the campus features low-flow fixtures in all buildings, efficient laundry machines in 80 percent of buildings, and weather-informed irrigation, among other technologies. Rainwater collection for toilet flushing, green roofs, and porous pavement prevent stormwater runoff.