Which sustainable retail invention, first patented in 1977 but not widely adopted until the 2000s, has eliminated an estimated 150 billion pieces of single-use plastic annually in global retail?

The retail industry has been dramatically transformed by innovations in sustainability. As consumers become more environmentally conscious, retailers have responded with groundbreaking discoveries and inventions that reduce environmental impact while maintaining profitability. This trivia question focuses on a pivotal sustainability invention that revolutionized how products are packaged and sold in modern retail environments. Test your knowledge about the intersection of sustainability innovations and retail practices!

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The biodegradable shopping bag made from corn starch polymers
The plastic bottle recycling reverse vending machine
The cardboard hanger system for clothing retail
The compostable food packaging made from mushroom mycelium