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This plastic is made from milk and it vanishes in 13 weeks
(www.sciencedaily.com)
General discussions about "science" itself
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I don't have an answer for the cost of life, but I have heard many times that milk and cheese is overly abundant in the USA.
I do agree that it should be much cheaper to use cellulose/plant composite for these things. The problem is sealing it.
Yes, dairy is cheap in the US, only due to government subsidy.