A delicate mix of sophistication and natural splendor, the capital of the Hawaiian Islands offers the best of both worlds and, little surprise, reigns as No. 1.

Surprised? We were too. But the “smog capital of the U.S.” has taken a turn for the cleaner, prominently promoting energy conservation and energy-efficient alternatives. Here’s hoping the hovering gray clouds disappear forever!

Perched on a river and surrounded by fertile valleys, the lovely West Coast city of Portland is an active proponent of sustainability. For decades, Oregon’s most populous city has been a leader in promoting energy conservation and renewable energy sources.

New York is famous for many things, Broadway, the Statue of Liberty, and the Empire State Building among them, but did you know that it is one of the greenest communities in the world? More than 80 percent of Manhattan residents travel to work by public transit, bicycle, or foot, consuming gasoline at a rate to rival the 1920s!

The capital of Idaho is praised by many for its superb quality of life, including it’s ever-present environmental conscience.

You’d never guess that grunge music got its start in this gorgeous port city. One trip to the Space Needle and you’ll understand why Seattleites want to protect their planet.

Next door to Silicon Valley’s clean-technology-loving venture capitalists, San Jose earns its place on the “green city” chart—and vows to climb it!

You left your heart there for good reason: the four star-restaurants, the Golden Gate Bridge, the diverse neighborhoods, and the eco-friendly way of life.

With four state parks (including the largest urban park in the U.S.), residents of the Sun City make it easy to see the importance and inspiration of Mother Nature.

Southern California boasts sunny skies, clear sea, active beachgoers, and the conservation-friendly heart of lovely San Diego.