Singapore government making preparations to house Singaporeans underground as it is running out of room for 7 million people

The New York Times, 25 Sep 2013
Singapore, with a little less land mass than New York City, is running out of room for its 5.4 million people.
The city-state has built upward — with apartment buildings reaching as high as 70 stories — reclaimed underused properties for housing and pushed out coastlines for more usable land.
But as one of the world’s most crowded cities, and with projections for 1.5 million more people in the next 15 years, Singapore’s options are as limited as its space. Full story

Related:
  1. Singapore Underground: The Lion City Frees Up Space Below - The Diplomat
  2. Crowded Singapore looks below for room to grow - CNBC.com