Helsinki, Finland has been declared the cleanest city in Europe. According to the Pollution Index 2018 Mid-Year rating compiled by numbeo.com, Tetovo (Macedonia), Naples (Italy) and Skopje (Macedonia) are among the three most polluted cities in Europe. Their annual average pollution index was 97.57, 84.61 and 82.17, respectively.  St. Petersburg took the 17th place with a score of 64.47, and … Continue reading Helsinki Declared the Cleanest City in Europe; Paris One of the Dirtiest