Which innovative sustainability initiative was first widely adopted by major religious text publishers in the 2010s?

Religious texts are among the most printed books in history, with billions of Bibles, Qurans, and other sacred texts produced annually. In recent years, many religious publishers have faced the challenge of balancing traditional production methods with modern sustainability concerns. This trivia question explores how the religious publishing industry has adapted to environmental challenges while maintaining reverence for sacred texts.

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Plant-based ink derived from organic sources that decompose naturally when buried (following Jewish and Muslim burial traditions for damaged texts)
Soy-based glues and binding materials certified as vegan-friendly for non-leather editions of sacred texts
Stone paper (calcium carbonate) Bible pages that require no water or trees to produce and remain waterproof
Carbon-offset program where a tree is planted for each leather-bound premium Bible or Quran produced