Do You Live in One of the World’s 15 Greenest Cities?

Here’s the top 15 cities and few runners up who have made the most impressive strides toward eco-friendliness and sustainability.

1. Rekyjavik, Iceland

Remember the grade-school memory device “Greenland is icy and Iceland is green”? It’s truer than ever thanks to progress made by Iceland and its capital city in recent years. Reykjavik has been putting hydrogen buses on its streets, and, like the rest of the country, its heat and electricity come entirely from renewable geothermal and hydropower sources and it’s determined to become fossil-fuel-free by 2050. The mayor has pledged to make Reykjavik the cleanest city in Europe. Take that, Greenland.

2. Portland, Oregon, U.S.

The City of Roses’ approach to urban planning and outdoor spaces has often earned it a spot on lists of the greenest places to live. Portland is the first U.S. city to enact a comprehensive plan to reduce CO2 emissions and has aggressively pushed green building initiatives. It also runs a comprehensive system of light rail, buses, and bike lanes to help keep cars off the roads, and it boasts 92,000 acres of green space and more than 74 miles of hiking, running, and biking trails.

3. Curitiba, Brazil

With citizens riding a bus system hailed as one of the world’s best and with municipal parks benefiting from the work of a flock of 30 lawn-trimming sheep, this midsized Brazilian city has become a model for other metropolises. About three-quarters of its residents rely on public transport, and the city boasts over 580 square feet of green space per inhabitant. As a result, according to one survey, 99 percent of Curitibans are happy with their hometown.

AlterNet