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This whistle fights fascists | How thousands of 3D-printed whistles are derailing ICE.
(www.theverge.com)
This is a most excellent place for technology news and articles.
This is incorrect, the author says that he prints whistles for 5c a pop, which is cheaper than dropshipping from China. This also implies that 3D printing whistles at home in that fashion is more productive when one doesn't live in China (or next to a whistle factory).
cheaper = ecologically friendlier? NOPE
I'd imagine the lack of being shipped many thousands of miles is what makes them ecologically friendlier.
If you produce the filament in your area. AFAIK most is from China.