Lonely Planet described Ljubljana as “extremely clean and increasingly green”. They praised the fact that over 10 hectares of the city center are pedestrianized, that its streets are washed with rainwater and recycled water, and that its cutting-edge waste management systems mean the city sends 80% less waste to landfill than it did in 2008. They also emphasized that Ljubljana was the first European capital to commit to the goal of becoming a "zero waste" city.
In addition to Ljubljana, Lonely Planet’s list of the most sustainable cities includes Copenhagen, Portland, Singapore, Lisbon, Bengaluru, Vancouver and San Francisco.
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