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Despite legislation meant to enact safety practices to prevent coal miners from getting black lung disease, workers are still being exposed to high levels of dust.
Green City Bottles is an eco-conscious company that focuses on the practice of upcycling - the process of converting waste materials into new products of better quality or a higher environmental value.
Students from MIT's Biodiesel team traveled to Sao Paulo, Brazil, last summer to begin Project Green Grease. The team converted two large trucks to run directly on filtered vegetable oil, rather than converting the oil itself into biodiesel fuel.