The old is being replaced with the new, the new replaced with the newer, in a perpetual cycle of destruction and creation.According to the Ministry of Housing & Urban-Rural Development, almost every structure built before 1999, roughly half of the current housing supply, is set to meet the sledgehammer at some point over the next 20 years.New houses are built almost as quickly as the old ones are cleared away. To minimize the dust due to collapsing work water was spreading throughout the process.