Which groundbreaking sustainability initiative did REI first implement in 2015 that revolutionized outdoor retail?

REI (Recreational Equipment Inc.) began as a simple cooperative for outdoor enthusiasts but evolved into one of the most respected names in outdoor retail. Their innovative approach to connecting consumers with nature while maintaining environmental responsibility has set industry standards. Test your knowledge about this iconic outdoor retailer's history and how it shaped the natural products marketplace.

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The #OptOutside campaign, closing all stores on Black Friday to encourage employees and customers to spend time outdoors
Introduction of the first fully biodegradable outdoor gear line made from mushroom leather and plant fibers
Launch of the 'Wilderness Exchange' program allowing customers to trade used gear for store credit
Implementation of solar-powered retail locations with zero carbon footprint across all North American stores