Working on the railroad? Using concrete could help environment
Monday, May 11, 2009 - 14:14
in Earth & Climate
Wood or concrete? Railroads around the world face that decision as they replace millions of deteriorating cross ties, also known as railway sleepers, those rectangular objects used as a base for railroad tracks. A new report concludes that emissions of carbon dioxide - one of the main greenhouse gases contributing to global warming - from production of concrete sleepers are up to six times less than emissions associated with timber sleepers. The study is scheduled for the 1 June issue of ACS' Environmental Science and Technology, a semi-monthly journal...