Guardian analysis has revealed a great air pollution blindspot stretching the length of Africa, across large parts of the former Soviet Union, south-east Asia and the Caribbean. In 92 countries the monitoring equipment and staff needed to measure one of the world’s most deadly pollutants - particulate matter (PM) - are simply not available. A further 33 countries, including Indonesia, Egypt and Russia monitor just one or two cities.
Outdoor air pollution kills 3.3 million people each year and it is getting worse. Globally, pollution levels have risen by 8% in five years. But there are signs that it can be brought under control. According to the WHO, pollution is falling in many places where monitoring occurs, including a third of cities in low- and middle-income countries.
Setting up stations to record pollution was the first step, said a WHO spokeswoman: “The cities which have invested in the capacity to regularly monitor and report the local air quality measurements have already demonstrated a commitment to starting to address air quality issues and public health.”