Land is a luxury that Singaporeans cannot afford.
An island country of only 710 square km is already home to 5 million people.
No wonder, Singapores skyline is thick with skyscrapers.
The water powering the frames is recycled and filtered before returning to the plants.
All organic waste on the farm is composted and reused.
Water wheels are gravity aided, which take little electricity.
Ng wants to build over 2,000 towers in the next few years.
Ng sells his produce under the nameSkyGreensin grocery stores, providing consumers an alternative to imported products.
Jack Ng believes his system could be adopted around the world, especially in Southeast Asia.
Sources:PBS,Inhabitat,CNN,NPR,NYTimes
