1. Business Understanding
The air quality in Sofia, Bulgaria, has been a problem for some time already. The population of the city is constantly increasing and this brings more traffic on the streets. The car ownership in Sofia is among the highest in Europe with around 600 cars per 1000 citizens.
Another huge issue in Sofia is the usage of coal and wood for heating during the cold months of the year. Some of the neighborhoods are mostly heated with these materials.
Something which has not been researched well is the effect of the construction areas. The exiting trucks bring dirt on the streets. This way the streets and the sidewalks are completely covered by (fine) dust, which by movement goes in the air.
The location of the city is also a huge contributing factor to the bad air quality. The temperature inversions and the resulting fogs in the winter months slow down the dispersion of the air pollutants.
2. Data Understanding
3. Data Preparation