Home - Environmental Stewardship Environmental Stewardship More than a water supply project, the desalination plant will preserve and enhance air quality and the coastal environment. First major California infrastructure project to eliminate its carbon footprint. Preserve the 400-acre Agua Hedionda Lagoon and its recreational and marine life resources. Restore 66 acres of coastal wetlands in South San Diego Bay. Wildfire recovery - plant 5,000 trees in areas damaged by local wildfires. View our final Marine Life Mitigation Plan and final Energy Minimization and Green House Gas Reduction Plan (appendices not included).