[fakedang]

How is that any relevant? Any international competition will have a significant aviation footprint - especially something like the Olympics which involves far more countries than the World cup. In fact, I'd reckon the aviation footprint will be lower because of Qatar's relatively central position in the old world, from where fans are more likely to travel to watch a live football game.

What's more relevant here from an environmental standpoint is the cost of adding lifestyle amenities (water, energy, landscaping, construction, etc) on the ground for the million or so football fans who will descend upon a country not especially designed to handle such a high volume of traffic without committing some serious ecological cost.