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The International Energy Agency reports that 1.3 billion people - 18 percent of the global population - live without electricity , with many depending on kerosene lamps for light . The crowdfunded GravityLight provides a safer , brighter alternative using LED technology and simple kinetics .

The end of the device can support a 12 kg bag of sand , rocks , or other minerals . The force of the weight turns the GravityLight ’ s gears to power a DC generator . The total power output stands at just one deciwatt , enough to power an LED light up to five times brighter ( measured in lumens ) than a standard kerosene lamp . Once the light runs out , the weight can be lifted and dropped to produce more .

With its recent market launch , the project has the potential to improve the lives of communities in undeveloped regions such as Sub-Saharan Africa .

Millions of run on coa the initiativ Clean Coo Energy , an student Ja fans to cre from burn coal or wo inhalation

An unlikely blend of military technology a that led to the development of the Stirling development of the most efficient solar d The proof ? A pair of 100-square-meter s extensive tests beneath the unforgiving r

Pioneered by Swedish company Ripas said to convert roughly 1 / 3 of the sun ’ s e making it nearly twice as efficient as stan years of impressive results from these gr to enter the commercial space . Experime Power showed an electricity generation r per dish , or enough to power two dozen power derived from coal would release o dioxide . These benchmarks make the ne for many European nations seeking to m

However , Ripasso ’ s biggest challenge drop in price annually , and the large sola amounts of electricity under constant su funding , CEO Gunnar Larsson is confide

24 August 2015