Comments by "Gaza is not Amalek" (@Ass_of_Amalek) on "How To Make Plastic From Seaweed | World Wide Waste | Business Insider" video.

I think this has a lot more potential than most of the "environmentally friendly" products you have featured. I assume it's only suitable for dry applications (basically any biodegradeable plastic replacement is, because if it was highly water-repellant, it would also repell microbes), but that's still a lot of applications. and there are many countries with bad enough waste management (which realistically means a lack of trash-fired powerplants) that making packaging biodegradeable helps a lot.
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