I APPLAUD Apple for demonstrating the commitment to the environment. Aluminum and glass are recyclable materials, and their systems have been arsenic, mercury and PVC free for a long time now. Everyone complains about the "glossy" glass displays, but research the difference between glass and plastic fronts, not just on the environment but also on color/gamma correction. A lot of professionals use glass/glossy displays and simply implement a hood if needed. I have a 24" LED LCD and a 23" CCFL LCD in the same room, and the light varies quite often, I prefer the LED LCD, and I admit having the two allows for recognizing differences in projects, if any, which are rare. Besides, the price points for an IPS LED LCD panel with a built in camera and speakers are pretty darn good.
http://www.apple.com/macpro/environment.html
http://www.apple.com/macpro/environment.html