As a self-contained city state, this measure helped reduce reliance on water imported from Malaysia and is deemed an important development for national resource independence.

FORBES: On World Water Day: A Call for Innovation

He told the Resource 2012 forum on water, food and energy scarcity that the development of shale oil and gas was "quite extraordinary", and that the world was now entering the "latest age of primary energy".

BBC: Shale will free US from oil imports, says ex-BP boss