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"Longtime clean energy investors know there are dangers at every turn. Whether it&amp;#039;s the promise of a better technology that doesn&amp;#039;t take off, an emerging market that never emerges, or a"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.aol.com/article/2011/07/29/the-3-worst-clean-tech-stocks/20004749/?gen=1>