Beijing's air quality is "better than we have feared" but the International Olympic Committee is prepared to postpone some long-duration events if pollution levels rise, IOC president Jacques Rogge said. 

Rogge said certain outdoor events lasting more than one hour could be postponed if pollution levels exceed certain thresholds. "Everything that is under one hour of continuous high intensity effort is not a problem. Every indoor sport is without problem. Every sport up to one hour is OK," Rogge said. "Above one hour, if the pollution levels are too high  we'll just postpone the competition for a couple of hours until it is at an acceptable level.”