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- Mexico City’s Manuel Gea Gonzalez Hospital Has an Ornate Double Skin that Filters Air Pollution Wed, 27 Mar 13, 4:30amRead the rest of Mexico City’s Manuel Gea Gonzalez Hospital Has an Ornate Double Skin that Filters Air Pollution Permalink | Add to del.icio.us | digg Post tags: double skinned air filter, eco design, Elegant...