03/05/2013

Hong Kong struggles to combat waste crisis

An army of road sweepers and refuse collectors keep the streets clean in the heart of Hong Kong—but on the outskirts, growing mountains of waste are testament to what campaigners say is an environmental crisis.

Dual-color lasers could lead to cheap and efficient LED lighting

(Phys.org) —A new semiconductor device capable of emitting two distinct colours has been created by a group of researchers in the US, potentially opening up the possibility of using light emitting diodes (LEDs) universally ...

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