Air pollution in Thessaloniki

Follow the link to read an article about air pollution in Thessaloniki

https://www.ekathimerini.com/news/1160120/greece-taken-to-court-over-thessaloniki-air-pollution/

and use the following application to check air quality in our city during the year

https://www.iqair.com/greece/central-macedonia/thessaloniki

Finally, have a look at the following graph showing greenhouse gas emissions in Greece.

https://ourworldindata.org/grapher/ghg-emissions-by-sector?time=latest&country=%7EGRC

What are the two major causes of air pollution in Greece?