Answer: an environmentally important material which says publishing can have a positive future without negatively impacting our planet.

Consisting of up to 80% rock flour, it is produced without water, trees, bleach or acids. And the next book from the Bayer Foundations, The Beauty of Impact (Food) – innovations for purpose series – will be printed on rock paper. It will showcase key innovations and projects changing the food and agriculture landscape and have essays from leading global voices on the topic.