A look back at Greenpeace's 'world's greenest smartphone makers' list

To mark Earth Day 2014, we take a look back at the top six smartphone manufacturers that have scored high "in terms of sustainability, greenhouse gas emissions, recycling, and use of precious earth minerals, as well as on issues such as a product's energy efficiency." The list is culled from last year's "Greenpeace Guide to Greener Electronics." Click through the gallery to find out if your favorite brand is on the list. (Via AFP Relax)