Although set in England, there was only one actor, Simon Needham, who is actually from England. He served as an accent coach to the rest of the cast throughout the shoot.
During the office walk through scene, a makeshift dolly was used made from a wheelchair, four screws, and a wood plank after it was discovered that the doorway dolly was too wide for the narrow hallway.
The Kyoto Protocol, which is the base subject of the film, is still in effect in most countries around the world.