Singapore City
Singapore is known for its clean streets as people take the hygiene maintenance of their city very seriously.
Brisbane, Australia
Another great example of a place that is kept clean by its citizens.
Stockholm, Sweden
They have a very sustainable waste management system and even environment-friendly public transport.
Copenhagen, Denmark
Not only the cleanest, Copenhagen is also the most liveable city in the world as per The Economist.
Oslo, Norway
The fresh air and clean streets of this city make it a very pleasant choice and an absolutely stunning city to live in.