| http://www.w3.org/ns/prov#value | - The World Health Organization (WHO), an agency of the United Nations, states that currently about 3 billion people ??? nearly half of the global population ??? cook and heat their homes using inefficient and dirty technologies, including open fires and ???simple stoves burning biomass (wood, animal dung and crop waste) and coal.??? The WHO calls this phenomenon ???the forgotten 3 billion.??? [Worl
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