China Daily/ReutersAir pollution in urban areas is getting worse. Between 2008 and 2013, global urban air pollution levels rose by 8%. Some 80% of all urban areas have air pollution levels above what's considered healthy by the World Health Organization, a new report said Thursday. The rate is even more dismal for cities with more than 100,000 people in low- and middle-income countries: The report found that 98% of those areas had unhealthy air.