Which sustainable innovation has Oxford University Press implemented to reduce the environmental impact of their dictionary production?

The publishing industry has been undergoing significant sustainability transformations in recent years, particularly in the realm of language resources like dictionaries and reference materials. As environmental consciousness grows, publishers have been innovating to reduce their ecological footprint while still delivering high-quality linguistic resources. This poll tests your knowledge about how sustainability practices are reshaping the production and distribution of language learning tools and reference materials.

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Transition to plant-based inks and recycled paper for all physical dictionaries, reducing carbon footprint by 30%
Creation of biodegradable dictionary pages that dissolve in water after 5 years of use
Replacing all physical dictionaries with digital-only versions accessed exclusively through solar-powered devices
Implementation of edible paper technology allowing users to consume dictionary pages after reading them