Austin, Texas

Home to the first Whole Foods Market and more than 300 days of sunshine a year (and you thought this city was all about the music) Austin spreads out among 205 parks, 14 nature preserves, and 25 greenbelts. Talk about green. The city plans to meet 20 percent of its energy needs with renewable energy and energy efficiency by 2020. Factor in county laws protecting the region’s natural watershed from development, a recycling center that dates back to 1970, a dozen outdoor farmer’s markets, city buses that offer free rides on ‘high ozone’ days and an innovative “pay-as-you-throw” trash collection program that rewards residents for being less wasteful and Austin easily earns a spot on the Green List.

Burlington, Vermont

In this small city on Lake Champlain, community pride and responsibility drive the urge to be green. More than one-third of all energy used in the city comes from renewable resources, an impressive statistic in chilly New England. Burlington laws don’t allow the use of pesticides on public parks, land or waterways. Challenged by their local leaders to come up with environmental priorities and solutions to existing problems, residents formed an extensive network of citizen-based groups that take on everything from environmental programs to clean up toxic sites to watchdog groups to monitor pollution in Lake Champlain. With local agriculture a mainstay of the region, schools are switching to locally- and organically-grown foods. The idea of sustainability is becoming part of the school curriculum so, as Burlington’s children grow and take their places in the community — any community — they can take a greener way of thinking along with them.

San Francisco, California

To the superlatives the City by the Bay has acquired over the decades — steepest, foggiest, most expensive — add greenest. With bus, subway and ferry services that reach throughout the Bay Area, avid bikers and devoted car poolers, San Francisco has a good track record for getting people out of their cars. In fact, more than half the city’s residents use public or alternative transportation to get to work. With Golden Gate Park, the newly-decommissioned Presidio, beaches, extensive bike paths and access to the Pacific and the Bay, the city has an abundance of recreational options. Prevailing winds from the water help keep pollution at bay. The city is also a leader in green building, with more than 20 building projects registered for official green certification. And city residents are willing to tax themselves. Voters said yes to allowing the city to sell $100 million in revenue bonds to support renewable energy.

http://promo.realestate.yahoo.com/the_top_ten_greenest_cities.html