Amazon, Apple, Twitter Score Low on Clean Energy

Cupertino, California-based Apple got "D" grades for efficiency of datacenters, sharing information about power use, and lobbying utilities to provide clean energy.

Apple was given a flunking "F" when it came to locating datacenters in places where electricity comes from clean sources instead of climate-ruining coal.

Apple, but, rejected the Greenpeace findings as outdated or flat-out wrong, and said it was leading the pack when it comes to shifting datacenters to clean energy.