Why is it needed?
According to Euronews, Belgrade is the fourth most polluted city in Serbia, due to the two large coal power plants nearby.
The two plants are among the top 10 dirtiest plants in Europe, according to the European NGO Health and Environment Alliance (HEAL).
In 2019, Serbia ranked as Europe's fifth most polluted country with an average PM 2.5 in air pollution, according to the IQAir's World Air Quality Report.
Another report in December 2019 also put the country under increased scrutiny, as scientists claimed Serbia had Europe's worst per capita record for pollution-related deaths: 175 per 100,000 people.
Activists have also claimed that pollution in Serbia and in other parts of the Balkan peninsula is so bad that it can be seen, smelt and even tasted, especially during autumn and winter.