Cities aren’t known for being environmentally conscious – they’re large, they’re busy, and with higher population densities, they’re usually high in emissions. Pollutants can contaminate the air, the ground, the water supply, and even seep into surrounding areas. Not to mention, as pollutant hotspots, cities are large contributors to greenhouse gases, effectively adding to global increases in temperature.

If you’re an environmental type (which you should be!) but, love the city, this may pose a problem. However, the two don’t have to be mutually exclusive; here is a list of the top 10 greenest cities. These metro areas are not only over 1 million in population, but also show their eco-friendly stripes in carefully chosen categories.