Pollution index (Good, Moderate, Unhealthy, or Very Unhealthy)?
Very unhealthy. The air often smells like burnt particulates, you can't see buildings that are a few city blocks away, and you rarely see the sun. - Jul 2009
Very unhealthy. The pollution is the one really terrible thing about Guangzhou. It's a constant factor and will affect your health. It also makes normal outdoor activities much less enjoyable. - Jan 2009