According to new research from Pew Internet, 82% of American adults own a cell phone, Blackberry, iPhone or other similar devices. And 65% of adults who own them say they have slept with their cell phones on or right next to their beds.

Yet consumers don’t know what these devices are made of exactly, and what their environmental and health impact may be. Phone manufacturers aren’t required to share all the details. Some do anyway.

Not Apple, though. The company is keeping secrets as usual, this time from O2 EcoRatings the UK-based initiative to rank the most and least environmentally sustainable mobile phones.