aerial view of sunnyvale bay trail on top of former landfill. scenic view of san francisco bay with levees, salt marshes and

aerial america american bay area baylands california drone environment environmental gas green hiking hill landfill landscape law marsh methane mitigation nature overcast protected reclamation salt saltmarsh francisco scenery scenic serene shore shoreline silicon valley sky slough tidal trail trash treatment united states usa view warning waste water wetlands winter sunnyvale top former levees marshes sloughs landfill sloughs