Imagine how many trees are cut every year to print all these shiny new books. Nowadays, we have so many ways to continue reading without all this paper waste! 
Offer your old books to your friends and family so they can also enjoy the reading, donate them to charities, or sell them! 

When buying a book, try a second hand one, or borrow one from your local library! 
Finally, try switching to e-books, and save trees by reading on ypur screen. Easy!