UN representatives believe that by 2050 at least 80% of the planet's population will move to cities.
Such a situation cannot but affect the environment, and people themselves are used to looking for a clean place to live.
And Greenpeace employees went even further and named the cleanest city on Earth.
Of course, the assessment was based on European standards regarding air purity, etc. In total, 21 criteria were developed and implemented.
The largest cities of the Old World were assessed, such as Berlin, London, Vienna, Brussels, Rome, Paris, Moscow and other most attractive centers for modern residents.
The main focus was on clean air and the safety of public transport.
As a result, Copenhagen was recognized as the cleanest and most prosperous city in all respects.
Amsterdam and Oslo made it into the top three.
In last place (the unlucky 13th) is Rome.
The capital of the Russian Federation was in 12th place, and foggy London was just one position ahead of the golden-domed city.
Earlier we told you how many seconds it took to solve a Rubik's cube .