As far as I'm concerned, trees are a renewable resource... we can (and do) plant and grow more. Clear-cutting for farming is the biggest issue with tree loss, and that's pretty much outside the US. Not paper production. Growing trees takes carbon out of the atmosphere, using it and burying it making room for new trees is not a bad thing.
Beyond this, an actual book gives you a lot more context to help remember things... the feel, shape and even the physically relative position of a given page vs the book as a whole. You lose that when you go digital. You also tend to be tethered to some DRM scheme that can take your books away.
Beyond this, an actual book gives you a lot more context to help remember things... the feel, shape and even the physically relative position of a given page vs the book as a whole. You lose that when you go digital. You also tend to be tethered to some DRM scheme that can take your books away.