Which natural material was first successfully used to create biodegradable food packaging that breaks down completely in marine environments within 4-6 weeks?

Sustainability in retail packaging has become increasingly important as consumers and companies seek to reduce environmental impact. One of the most significant innovations has been the development of biodegradable packaging materials derived from natural sources. This trivia question explores a groundbreaking development in eco-friendly packaging that's changing how products are presented in the natural products industry.

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Seaweed (alginate)
Mushroom mycelium
Corn starch (PLA)
Bamboo fiber