"The government will try not to do something they don't think they can handle right now, " said Eddie Hui, Professor at the Department of Building and Real Estate of the Hong Kong Polytechnic University.

CNN: SHARE THIS

Also, scientists at the Hong Kong Polytechnic University have been able to build a nano-thin layer of particles of titanium dioxide, a substance that reacts with sunlight to break down dirt and other organic material.

FORBES: Nanotechnology's Disruptive Future

Materials scientist Dr. Walid A. Daoud and textile scientist Dr. John Xin, both from The Hong Kong Polytechnic University (PolyU), used nanotechnology -- whereby the tiniest particles available to man are used -- to come up with the concept.

CNN: Washing no longer dirty work