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A Revolution in Farming: Combines (6:23)
The combined harvester-thresher machine revolutionized farming in the early 20th century. How did combines change things and what did farmers use before their invention? From "Modern Marvels."
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A Revolution in Farming: Combines
A Revolution in Farming: CombinesVideo Clip (6:23)
Video Clip (6:23)
The combined harvester-thresher machine revolutionized farming in the early 20th century. How did combines change things and what did farmers use before their invention? From "Modern Marvels."
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Bio-Waste Recycling
Bio-Waste RecyclingVideo Clip (4:25)
Video Clip (4:25)
Agricultural bio-waste gets recycled into a variety of everyday materials.
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