The World Health Organisation (WHO) singles out air pollution as one of the greatest environmental threats to health, as it accounts for a high number of non-communicable diseases such as heart attack or stroke. 

There are at least seven million premature deaths annually due to the combined effects of outdoor and household air pollution recorded in developing countries, according to WHO.

Data from IQAir, a real-time air pollution website, shows that Kenya has an air quality that is 2.9 times above WHO recommendations. Globally, Kenya takes position 70 among countries with high air pollution.