I love how people supporting Apple on this in thread upon thread are just ignoring the fact that Apple made their MBPs less recyclable and less serviceable than they used to be. Just because Apple will take them back (and give you some small pittance in the form of a gift card for the parts they can sell or re-use: do you REALLY think they're losing out on the deal?) doesn't mean they're as environmentally friendly as the previous, non-retina MBPs.
So people are basically saying, screw the environment! Screw the consumer! Screw third-party Apple dealers! If Apple wants to glue a battery to their motherboard and make it so that only Apple can do anything to repair the machine, it must somehow magically be a good idea!
I love Apple products, but I do actually still use critical thinking when faced with new information. It's not good for consumers or the environment to suddenly come out with a product that is less eco-friendly and less serviceable, and also pull the rest of your products out of consideration as well for the environmental standard that you've been bragging about until recently.
When I first started buying Apple products in the mid-2000's, I remember that Apple was having a hard time getting certified as "green" by anyone. Their products at the time had higher than average levels of toxic materials. Looking back on those days as "the good old days" is like thinking fondly of our childhood when we'd collect the mercury from broken thermometers so we could roll the pretty, harmless, liquid metal across our palms.
Thank Steve Apple made a conscious effort to use fewer harmful materials in their products, and thinner computers use less material overall.