You may already know that 80% of our water is imported in San Diego County. Water managers have implemented Desalination, and PURE water (wastewater recycled to drinking water) as further diversification strategies. This is great, but expensive and energy intensive. We are missing tremendous opportunities with water that is already here, which in turn decreases the carbon footprint of our water use. The Surfrider Foundation published this great short video, The Cycle of Insanity, back in 2010 to showcase water inefficiencies in Southern California. Reducing the amount of water we move around our state and how much we have to clean our water in order to repurpose it will greatly impact carbon emissions due to energy use. Rainwater and greywater harvesting specifically do this by using resources you already have onsite and using them for a purpose they are well suited to.