Earlier this month, I had written about World’s most livable cities. On the same lines, Mercer group has a top 25 list for the World’s cleanest cities. The list is topped by Calgary in Canada. Most of the cities (23 out of 25) lie in the Northern Hemisphere. Japan is the only Asian country on the list. There are no countries from South America, Africa and Australia continents. Auckland and Wellington in New Zealand are the only cities from the Southern Hemisphere.

How are the cities rated for cleanliness?
• A city has to face and resolve unsanitary problems and poor living condition
• Production of energy for homes and industries needs to well planned and regulated
• Waste management that involves closed landfills and preferably recycling which could bring profits
• Well managed transportation infrastructure that could impact cleanliness
• Logistical infrastructure that could possibly be a fuel saver and hence less pollution

Watch the slide show with description of the 25 cleanest cities in the World.

Via Forbes