In the modern era, as now, there are still 1.5 billion people in the world, arteriors contract espe

A British designer, Martin Riddiford recently discovered Earth's gravity-powered lights, GravityLight. Lights of pineapple is driven by the load weighing 25 pounds that fall slowly from a height of six feet in 30 minutes.
The resulting kinetic style is able to make the motor in the light rotates thousands of times per minute arteriors contract and produce light. arteriors contract Although lighter than the oil lamp, but the light still has shortcomings: every half hour, the light load must be raised arteriors contract manually to repeat the process. >> See image
To businessweek.com, Martin Riddiford said, GravityLight immediately tested in Africa, Asia, Latin America, and the Middle East this summer. "According to the plan, this lamp will be marketed at a price of $ 5 (about 50 thousand) per unit," said Martin, who plans to use this technology for cell phone chargers. arteriors contract
In the modern era, as now, there are still 1.5 billion people in the world, arteriors contract especially from developing countries, who live without arteriors contract electricity-and using kerosene lamps as lighting equipment home. In fact, data from the World Bank said, they put out 10% of his income, which is about $ 36 billion, to buy kerosene.
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