When people think of cities, they image traffic jam, noise, and pollution. Many people just commute to work in the cities. They want to live in places where the air is clean and the water is pure. To determine whether a city is clean, sewage systems, water availability and drinkability, air pollution, waste removal, and traffic congestion are taken into consideration.
The following cleanest cities are largely located in countries noted for their industrialization.
Oslo is the capital and largest city in Norway. It is a hub of Norwegian trade, industry, banking, and shipping. There is no industry. The air is fresh in the summer except vehicular and heating emissions in the winter.
Electricity is generated from methane gas from the landfill.
Copenhagen, the capital and largest city of Denmark, is one of the most environmentally friendly cities in the world. 36% of all citizens commute to cycle to work.
Air quality in Helsinki has been improved thanks to the consolidation of energy production and efficient cleaning equipment and cleaner fuels.
There has been a decrease in Helsinki’s emissions from industry and heating private residences, and power stations.
In Kobe, there is less polluting emissions from backed-up traffic thanks to the well-designed road systems. Separate storm drainage prevents heavy rains from running into the sewage.
Wellington, the capital city and third most populous urban area of New Zealand, was ranked 12th in the world by the 2009 Mercer Quality of Living Survey.
Honolulu is one of the greenest and cleanest cities in the world. The city has no air concern except VOG (volcanic smog).
Ottawa, the capital of Canada, has remarkable water quality.
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