жижиг дизель хөдөлгүүрийн үр ашигтай бөмбөг тээрэм
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 = petroleum to drive 1 mile Plastic bags take 400 1,000 years to biodegrade Less than 10% of ...
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