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алх тээрэм вики танилцуулга. зөөврийн алх тээрэм okla алхны тээрэм бутлагч дээр ppt PowerPoint Presentation Let s Talk Plastic Free plastic bags are too expensive United States uses 100 billion plastic bags per year = 12 million barrels of petroleum or 504 million gallons = 4 billion/year cost passed onto consumers 13 bags ...
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