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Tides' Thoreau Center for Sustainability are green nonprofit centers that house more than 70 nonprofit organizations in San Francisco and New York City .[1] Thoreau Centers for Sustainability are operated by Tides Shared Spaces, a Tides initiative.[1]
In 1994, the Thoreau Center for Sustainability was proposed to The Presidio Trust in San Francisco , California and opened in 1996. It is an adaptive reuse of the Letterman Army Hospital.
In 2006, a Thoreau Center for Sustainability opened in Lower Manhattan, New York.