It’s actually more than just going carbon neutral across the company; Microsoft is making each of its individual divisions responsible for offsetting its own emissions. That’s kind of a big deal, especially because a division that uses enormous server farms — cloud computing, anyone? — uses tremendous amounts of energy. Critics like Greenpeace aren’t crazy about the method, which allows divisions to purchase carbon offsets — they’d prefer the company turn to renewable energy sources. Can’t win ’em all.