it is one of many reasons the country's president, joko widodo, wants to move it, vowing to build a newf a sustainable, smart city of the likes indonesia has never seen. but, as rebecca henschke reports, there are fears about the environmental impact of the move. jakarta is sinking at alarming rate. it's predicted that almost all the land here in north jakarta will be underwater injust 30 years. this was built in an attempt to hold back the tide, a giant sea wall that goes for hundreds of metres. but what is on the other side has become an iconic image of a city that is living on borrowed time. this mosque went under years ago, and the predictions for this area are bleak. faced with this future, the president wants to move the capital to a new site, 1,000 km away, to the island of borneo. nearly 2,000 hectares of land has been designated. the estimate cost — $33 billion. and the deadline within just four years. this is what it could look like. the winning urban design, selected through a government—run competition, is of a sustainable forest city. we have a very good opportunity to star