Which pioneering sustainability initiative did Texas Instruments launch in 2012 that revolutionized the environmental impact of graphing calculators?

In recent years, mathematics education companies have been integrating sustainability initiatives into their business models. From carbon-neutral publishing to eco-friendly manipulatives, the industry is evolving to address environmental concerns while maintaining educational excellence. This trivia question explores a groundbreaking sustainability initiative from a major mathematics education provider that changed industry standards. Test your knowledge of how the mathematics education sector is innovating toward sustainability!

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TI-Recycle Program: The first large-scale calculator recycling program that reclaimed rare earth elements from used devices
Solar-Powered TI-84: The first mainstream solar-powered graphing calculator eliminating the need for disposable batteries
Biodegradable Calculator Casings: Replacing plastic housings with plant-based biodegradable materials
Digital-Only Documentation: Eliminating all printed manuals and replacing them with in-calculator tutorials