Which sustainable innovation has most significantly reduced the environmental impact of dictionary publishing in the past decade?

Modern dictionaries and language learning tools are embracing sustainability in their production and design. From digital transformations to eco-friendly printing practices, the linguistics industry is finding innovative ways to reduce its environmental footprint while preserving and promoting language. Test your knowledge about how sustainability practices have changed the physical and digital landscape of language resources in recent years.

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The shift to plant-based inks derived from algae that change color based on surrounding air quality
The widespread adoption of digital formats and apps, reducing paper consumption by over 70% for major dictionary publishers
The introduction of sound-activated pages that eliminate the need for electronic pronunciation guides
The development of decomposable paper that dissolves after exactly 10 years to encourage dictionary updates