Pre-fab classroom buildings, or "portables," are supposed to provide a temporary, affordable solution to overcrowded schools. But many are kept in use well beyond their intended expiration dates, accumulating additional costs and sometimes causing difficulties. Special correspondent Katie Campbell of…

Oct 09

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How to Build a Cooler City

As global temperatures rise, urban areas are facing challenges in keeping their infrastructure and their residents cool. Chicago is tackling that problem with a green design makeover. This report is part of our Coping with Climate Change series.

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