natural gas obtained from non-fracked methane biogas generated from organic landfill waste. Santa Monica adopted a Community Energy Independence Initiative, with a goal of achieving complete energy independence by 2020 (vs. California's already ambitious 33% renewables goal). The city exceeded that aspiration when, in February 2019, it switched over to electricity from the Clean Power Alliance, with a citywide default of 100% renewably sourced energy. That same year, the Santa Monica City Council adopted a Climate Action and Adaptation Plan aimed at achieving an 80% cut in carbon emissions by 2030, and reaching community-wide carbon neutrality by 2050 or sooner. An urban runoff facility (SMURFF), the first of its kind in the US, catches and treats of water each week that would otherwise flow into the bay via storm-drains and sells it back to end-users within the city for reuse as gray-water, while bioswales throughout the city allow rainwater to percolate into and replenish the groundwater. The groundwater supply plays an important role in the city's Sustainable Water Master Plan, whereby Santa Monica has set a goal of attaining 100% water independence by 2020. The city has numerous programs designed to promote water conservation among residents, including a rebate for those who convert lawns to drought-tolerant gardens that require less water. Santa Monica has also instituted a green building-code whereby merely constructing to code automatically renders a building equivalent to the US Green Building Council's LEED Silver standards. The city's Main Library is one of many LEED certified or LEED equivalent buildings in the city. It is built over a 200,000 gallon cistern that collects filtered stormwater from the roof. The water is used for landscape irrigation. Since 2009, Santa Monica has been developing the Zero Waste Strategic Operations Plan by which the city will set a goal of diverting at least 95% of all waste away from landfills, and toward recycling and composting, by 2030. The plan includes a food waste composting program, which diverts 3 million pounds of restaurant food waste away from landfills annually. , 77% of all solid waste produced citywide is diverted from landfills. Environmentally focused initiatives include curbside recycling, curbside composting bins (in addition to trash, yard-waste, and recycle bins), farmers' markets, community gardens, garden-share, an urban forest initiative, a hazardous materials home-collection service, and a green business certification. As in other coastal beach communities, coastal erosion due to coastal infrastructure and high human