Every day, 21,000 of them sail into U.S. ports, carrying everything from tea to T-shirts, but just a fraction ever go back. Shipping containers. Strong, durable and eminently recyclable. An estimated 700,000 are sitting near the nation’s waterfronts, unused, wasting shipyard space and littering landfills. It all presents an incredible opportunity for developers of environmentally friendly, sustainable real estate.

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