Which sustainable innovation has Oxford University Press implemented in their recent editions of religious texts that has significantly reduced environmental impact while maintaining traditional appearance?

The publication of religious texts represents one of humanity's oldest continuous product lines, dating back thousands of years. Modern publishers of these sacred works face unique challenges balancing tradition with sustainability. This trivia focuses on how contemporary religious text publishers have incorporated sustainable practices while maintaining reverence for these important cultural and spiritual artifacts.

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Plant-based inks derived from organic materials mentioned in religious texts (such as hyssop and olive extracts for Biblical texts)
Stone paper (calcium carbonate-based) that uses no water, trees, bleach or acids in production while mimicking traditional thin Bible pages
Recycled leather bindings treated with natural preservatives mentioned in ancient religious traditions
Carbon-neutral printing using solar-powered presses located near monasteries that contribute editorial oversight