The big question is which is worse for the environment in the long term? The process of making leather, or all the fine woven cases sitting in landfills the world over? The reality is leather is readily available and will be for as long as we eat meat. There are far larger consumers of leather ( automakers, clothing makers, etc ) than Apple so their decision to stop using leather is a relatively small drop in the bucket. Whats worse? using petrochemicals to make plastics that take thousands of years to breakdown? or treating an already existing natural product to make it more usable, beautiful, and longer lasting? I know Apple claims leather releases more carbon than recycling plastic but that only speaks to the manufacturing process... what about the longer term implications of all the plastic? Leather will eventually breakdown and biodegrade. Plastic won't do that. My two cents are leather is better now and in the future.