Singapore makes green building push
18 September 2013 Last updated at 01:34 BST
By 2030, most of the world's population will be living in Asian mega-cities.
But with major urban growth come pollution problems. And it takes more than just recycling and planting trees to combat that.
Singapore, for example, is looking to offset the effects of a concrete jungle by incorporating green ideas into its urban planning.
Currently, a quarter of its buildings are environmentally-friendly and the city-state is looking to raise that figure to 80% in the coming years.
The BBC's Leisha Chi spoke to Mark Ginsberg. senior fellow at the US Green Building Council to find out more.