Chicken and fish might be an exception (although in the case of the latter, you’re destroying the world’s oceans via depletion and plastic pollution, and in the case of the former, you’re helping incubate what’s probably going to become another worldwide pandemic).
If you’re eating beef, you’re doing much more damage to the trees than reading books can ever realistically do.
Animal products in general.
Chicken and fish might be an exception (although in the case of the latter, you’re destroying the world’s oceans via depletion and plastic pollution, and in the case of the former, you’re helping incubate what’s probably going to become another worldwide pandemic).
Runoff from chicken abattoirs is incredibly toxic, so it’s not an exception.
But beef is tastier then books.