I'm not a scientist so you might have more insight that me on that, but the "abstract" section of this article pretty much confirms what Greta is saying, no ?
https://www.nature.com/articles/s41893-020-0547-0
https://www.nature.com/articles/s41893-020-0547-0
Cutting so many trees for Wasting so much paper for a book about environment in the age of Ebooks is legit hypocrisy