Atlanta Journal Constitution: This oil-rich swath of desert is better known for its carbon-emitting excesses. In Dubai, an indoor ski slope makes snow year-round, even during the sweltering summer. But amid all of the air-conditioned SUVs and mega-malls, the ruling sheikhs have taken an environmental turn. Construction is under way on what is being called the world`s first carbon-neutral city, rising from a featureless sandy expanse near the Abu Dhabi airport. Green as the city is intended to be, some …