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ວິສະວະກອນ ປາກິສຖານ ໃຊ້ເຟືອງ ທີ່ຖິ້ມແລ້ວ ເປັນເຊື້ອໄຟ


A Pakistani engineer has designed a system to help developing countries avoid fuel imports by making ethanol with the millions of tons of straw that are wasted each year. Faith Lapidus reports.

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