Facebook designed its new-age data center for the Oregon high desert, taking advantage of the low temperatures and humidity and cooling its computing hardware with the outside air. But the design works nearly as well in the woodlands of North Carolina, a place where temperatures and humidity are, shall we say, considerably higher.

Call it the battle of Maiden. This week, Apple and Greenpeace traded very public barbs over how much clean power is used by Apple’s $1 billion state-of-the-art data center in Maiden, North Carolina. But it appears that much of the arguing stems from their inability to agree on what they’re arguing about. On Monday, Greenpeace released a report calling Apple’s data center a power-hungry threat to the environment, but Apple responded by saying Greenpeace got its facts wrong. The key sticking point is a simple question: How much energy is Apple’s data center burning? Greenpeace says 100 megawatts, while Apple says it’s only 20 megawatts. The truth may be somewhere in-between.