5. Sony Xperia Z
Total Score: 8
Sony is famous for being one of the best smartphone manufacturers ever, especially after it was separated from Ericsson, and now it is making one after another eco-friendly model that have the smallest amount of the unsafe materials. This company is trying to achieve zero environment damage through their entire product line. Sony Xperia Z, Xperia SP, Xperia ZR have all succeeded passing the big test and reached the top of the 6 most green smartphones for eco-friendly consumers list.