Kindle Books Outselling All Print Books on Amazon

Amazon has announced that its Kindle ebooks are outselling all printed books. For every 100 print books sold, Amazon sells 105 Kindle books. A study last year by the Cleantech Group found that a Kindle has a lower carbon footprint than printed books once you replace the purchase of 22.5 new books with ebooks.  Now that Amazon is selling so many ebooks, it's clear people are reducing their reading-related carbon footprints very quickly.