Estimates show that in 2015, the death rate due to air pollution was highest in landlocked developing countries (LLDC) followed by least developed countries (LDCs), and lowest in developed regions (see figure 20). The campaign involves partners such as - WHO, UNER World Bank, UN-Habitat and several countries. Most high-income untries have well-developed air quality onitoring and reporting networks at le ground level, which generally provide nsistent hourly readings of air quality. On the other hand, many low- and middle-income countries lack sufficient data coverage for all their human settlements.