Situated between the ocean and the mountains, this North American city has the least amount of carbon emissions among major world cities. Since 2010, Vancouver has worked hard to implement programmes that take care of the environment, including the promotion of biking as a means of transportation, increasing the number of charging ports for electric vehicles and waste management systems that keep the city free of contamination and pollution. Vancouver is competitively working towards becoming the greenest city in the world by 2020.

Known as Europe’s Green Capital, Copenhagen is particularly mindful about developing itself hand in hand with nature. Like others on this list, it's a city where the number of bicycles surpasses the number of cars. It's also another city vying to become the most eco-friendly city in the world, putting into effort various initiatives like green roofs, electric public transport and the planting of 100,000 trees. 

Amsterdam is definitely one of the coolest cities in Europe, with a perfect combination of the new and the old, and as a city that contains more bikes than even people. There are also more than 300 charging stations for electric vehicles in the city, and local business is big. Local farmers are well supported as the city loves its home-grown and organic products, and whereas in some big cities fast fashion thrives, in Amsterdam, many shops sell slow fashion, made from eco-friendly materials that have come from a process that doesn't contaminate the water with poisonous dyes or agents. 

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