Hong Kong elderly urged to stay indoors as air pollution spikes to serious levels

Severe haze in Hong Kong over the past two days has prompted a government warning of serious health risks, with experts urging the elderly and vulnerable to stay indoors until sunset. Air quality health risk levels at some of Hong Kong’s roadside monitoring stations rose on Wednesday and Thursday, with experts attributing the surge to elevated ozone levels caused by sunlight and high temperatures and warning that conditions were likely to persist over the next few days. On Wednesday afternoon,...