According to the statistics of the World Health Organization, Finland has the best air quality in the world. Most developed countries have been able to decrease pollutants and improve air quality during the past decades but, unfortunately, in many developing countries the trend is reverse. In fact, 99 % of the world population live in areas where air pollution levels exceed WHO guidelines. This blog post is an overview of pollution-related data and trends.
![Pollution-related deaths](https://blogs.helsinki.fi/mctarja/files/2023/10/world_death_percent.gif)