Given its tourism-oriented economy, the city has also set up a mobile app, which informs both tourists and locals of what to do in Phuket. To illustrate this trend, outdoor concentrations of fine particulate matter (PMJS), which is hazardous to health, is commonly used as a proxy measure of pollution. Practically all urban residents in the region are exposed to ambient air pollution exceeding the WHO guidelines on the concentration of fine particulate ambient air pollution (i.e., 10 PM2.5 pg/m3). Only 0.2% of urban residents in Emerging Asia live in areas with pollution concentrations at or below this level (Figure 2).