What are 'green cities'?

Dear EarthTalk: What is the "green cities" movement? - John Moulton, Greenwich, Conn.

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<p><a href="http://www.physorg.com/news157055703.html">What are 'green cities'?</a></p> <p> Dear EarthTalk: What is the "green cities" movement? - John Moulton, Greenwich, Conn.</p>