Which sustainability initiative was first adopted by major mathematics textbook publishers in 2018, reducing their carbon footprint by approximately 32%?

The mathematics education industry has been evolving to embrace sustainability initiatives in recent years. From eco-friendly manipulatives to carbon-neutral production of textbooks, companies are finding innovative ways to reduce environmental impact while delivering quality mathematical learning tools. This trivia question explores a significant sustainability breakthrough that changed how mathematical educational products are produced and packaged. Test your knowledge of how the math education industry is addressing environmental challenges!

This is a live public trivia poll on AIPolls.Net. Vote and see real-time results.

Algae-based ink for printing formulas and diagrams
Transition to plant-based binding adhesives and recycled paper
Solar-powered digital companion apps for all textbooks
Carbon offset programs funding mathematics education in developing countries