Unclear sky poses threat to Games
By Chris Buckley BEIJING, July 28: Olympic host city Beijing was shrouded in haze on Monday 11 days before the Games begin, raising anxieties about whether it can deliver the clean skies promised for the world's top athletes. The city's chronic pollution, a sometimes acrid mix of construction dust, vehicle exhaust and factory and power plant fumes, has been one of the biggest worries for Games organisers. Beijing has ordered many of its 3.3 million cars off roads and halted much construction and factory production in an effort to cut pollution before the Games open on August 8.