Cement-eating bacteria are the main causes of deterioration of bridges, roads and other structures. But now, their appetite for destruction can be used for a cleaner world. The microbes can
High mountains and deep gorges may no longer daunt the 3 million Nepalese who have to travel extensively in the trading season. A Swiss organisation, Helvetas, is building bridges there and training
Sweden and Denmark, two of the world s most eco friendly countries, compromise on environment to go ahead with the construction of Europe s longest bridge