A new study projects a bleak future for San Francisco Bay's tidal marshes under high sea-level rise scenarios. In the worst case scenario 93 percent of San Francisco Bay's tidal marsh could be lost in the next 50-100 years [with 5.4 feet or 1.65 meters of sea-level rise, low sediment and no significant restoration]. However, restoration currently underway could keep marshes intact as sea-levels rise....