LIBROS DEL AUTOR: zerihun yohannes

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  • Biogas Energy Production and Use
    Zerihun Yohannes
    In developing countries local environmental problems associated with energy use remain at least as pressing as they were in industrialized countries 50 or 100 years ago. Furthermore, it is the poor who suffer most severely from such problems; because it is they who, for lack of access to better alternatives, are forced to rely up on the most inefficient and polluting source of ...
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