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The supply can't just be produced out of the blue. There isn't enough land in San Francisco to build a whole bunch of housing. The key is to expand out of city or create zones in city for affordable housing.

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There's plenty of land if you build vertically instead of flat. There's a bunch of 2-4 story buildings that could be 10-20+ story buildings.

Right but this is not China, we need to follow guidelines as bay area is earthquake prone.

Earthquake concerns are a red herring, the lack of height is entirely self-inflicted. We know how to build tall buildings safely, but choose not to

The second tallest structure in the world (the Tokyo Skytree[1]) is in Tokyo, which is even more earthquake prone than the Bay Area[2].

[1] http://en.wikipedia.org/wiki/Tokyo_Skytree

[2] http://www.fastcoexist.com/3017696/the-cities-most-at-risk-t...

Or the opposite -- get rid of zoning restrictions. Laissez-faire.

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