In 2014 as states were beginning to legislate bans on conventional plastic microbeads in cosmetics, there was a sense of excitement among biotech firms with materials they saw as ready stand-ins for the synthetic, nonbiodegradable ingredients polluting US waterways.
TerraVerdae BioWorks started ramping up production of its polyhydroxyalkanoate (PHA) microspheres, which it said were as natural as the walnut shell grit lawmakers were promoting as a viable microbead substitute,...
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