London bids to be world's greenest by 2012: mayor

Mayor Boris Johnson outlined plans to make London "the cleanest, greenest city on earth" by the 2012 Olympics and called for commitments from other world cities at a climate change conference.

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<p><a href="http://www.physorg.com/news161846242.html">London bids to be world's greenest by 2012: mayor</a></p> <p>Mayor Boris Johnson outlined plans to make London "the cleanest, greenest city on earth" by the 2012 Olympics and called for commitments from other world cities at a climate change conference.</p>