| http://www.w3.org/ns/prov#value | - Access to energy ??? which has traditionally meant hooking a house or community up to the electricity grid ??? needs to be redefined to include off-grid cleaner energy sources and fuels, such as solar power, liquefied petroleum gas and biomass derived from organic materials and waste, said Aaron Leopold, global energy advocate at Practical Action, an NGO that uses technology to fight poverty in de
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