As New York begins to thaw after record breaking winter conditions, city dwellers are forced to be on high alert for falling ice. Streets surrounding the 1,776-foot One World Trade Center have been closed following reports of ice shearing from its surface. Some blame the more energy efficient buildings for the deadly occurrence, believing that because the newer structures are able to hold in more heat their exteriors remain colder which aids the formation of ice. Materials and building form can help prevent this phenomena. You can learn more here.