There was a time when Kermit the Frog had it right — it wasn't easy being green. But that was before the arrival of LEED and Green Seal certifications. From composting and water conservation programs to green roofs and landscaping that provide natural habitats for local species, hotels are striving to help sustain our planet. And while we can appreciate a candlelit yurt made out of reclaimed materials, GAYOT's list of the Top 10 Green Hotels in the United States shows that being eco-friendly doesn't require sacrificing luxury. Each property in this collection is notable not only for its attitudes toward the environment, but also for its food scene, sense of style and exceptional level of comfort.