In this July 20, 2017, file photo, a worker prepares seawalls at a construction site in San Francisco.
San Francisco’s mayor has proposed building on a new bay on the city’s waterfront, which he said would be a natural extension of the city and help protect the city from the effects of climate change.
San Franciscans have long expressed concern about the bay, which has become a focus of environmental criticism as coastal erosion has increased and sea levels have risen.
The mayor proposed building a new sea wall on the waterfront, but that plan has been criticized by some in the local waterfront community.
In this June 11, 2017 photo, workers prepare seawalls for a seawall on the west side of the San Francisco Pier in San Jose, Calif.
The new sea walls proposed by Mayor Ed Lee and San Francisco City Supervisor Jane Kim would be built over the waterfront as part of a larger plan to increase the citywide barrier against rising sea levels.
San Diego has also been pushing for the creation of a barrier along its waterfront, and it has recently passed legislation requiring that new buildings on the Bay Area’s most heavily populated and heavily trafficked waterfronts be constructed on protected land.
But other cities have been pushing back, saying building on top of a bay is too risky, and that the barrier would be dangerous to the environment.
San Jose is one of a handful of major U.S. cities that have taken steps to build on top, but the city hasn’t followed through on its commitment.
Here’s a look at some of the ways in which San Jose’s proposal might differ from other cities’ plans.
What does the mayor say?
The mayor’s plan, titled “The Great Barrier Reef on the Seawall,” calls for a “seawall wall on top” that would be taller than the existing seawalls.
It says that in addition to creating a “continuous barrier of seawalls,” it would also “add an additional layer of marine protected land to the waterfront.”
It would include an existing bay in San Carlos Bay, the site of a proposed “sea wall,” and a “high rise” over the water.
What about the seawalls?
The city’s seawalls would be the first in the U.K., where they are a requirement of the government’s Coastal Communities Act.
San Carlos is already one of the biggest and most densely populated cities in the world.
The city is home to more than 2 million people and the bay is one the world’s most valuable natural wonders.
In addition to the barrier, the mayor’s proposal calls for creating an additional barrier over the bay in an area around the bay known as the “Cape Bays.”
It also calls for protecting the Bay of Fundy’s bay from storm surges and coastal erosion, and building an “overpass” to reduce the impact of the bay.
Why is the seawall wall a barrier?
San Francisco has long called for creating a barrier on its waterfront to protect the Bay, which is home a diverse array of life, from coral reefs to whales and sharks.
It has also argued that building on shore is dangerous for wildlife, and its own “Sea Sanctuary” is a protected area in the bay for whale watching, whale-watching tours, and other activities.
The San Francisco Bay is a natural barrier in itself, with water in the estuary, a large tidal zone, and deep estuaries to the east and west.
The water in that estuary is also a barrier to sea turtles and sharks, and is also where seals live.
The barrier also protects the bay from storms like the one that occurred on the reef on Tuesday, when a storm surge caused water to surge nearly 50 feet into the bay and wash into nearby neighborhoods, including the area where Lee is proposing to build.
It also protects San Francisco from flooding caused by storm surges caused by the ongoing El Niño phenomenon, which brings warmer waters to the Pacific Ocean, according to the U,S.
Bureau of Reclamation.
What are the alternatives?
The new barrier proposed by the mayor is a “sea floor barrier” that will not have any additional barriers on top.
This barrier is the largest of its kind in the United States, and could also become the most expensive barrier in the country.
The existing seawall in San Diego could be more expensive than the barrier proposed in San Bruno, but a seawalled version would cost $2.4 billion to build, according the city.
Building a seawalling barrier is “a long, hard slog,” according to Ben Kuchera, a professor of marine engineering at San Diego State University and the director of the Coastal Engineering Program at the University of California, San Diego.
He said the barrier should be constructed using more cost effective technologies, like more flexible seawalls that can be cut, and more durable structures that can withstand high winds.
Why can’t the city just build it?
The current seawall barrier is one