What lies beneath: Singapore plans a subterranean future

What lies beneath: Singapore plans a subterranean futureSpace-starved Singapore has expanded outwards by building into the sea and upwards by constructing high-rises but planners are now looking underground as they seek new areas for growth. Singapore has already built an underground highway and state-of-the-art air conditioning system, but is now looking to house more facilities beneath the surface in order to optimise land use above it.