Actress Daryl Hannah speak at a Denver rally organized by opponents of hydraulic fracturing Tuesday, Oct. 23, 2012. The rally was meant to push for the acceleration of clean-energy alternatives and to educate the public on what co-organizer Allison Wolff calls the dangers of hydraulic fracturing, which involves blasting water, sand and chemicals underground to free oil and natural gas. (AP Photo/Thomas Peipert)

Associated Press
Actress Daryl Hannah speak at a Denver rally organized by opponents of hydraulic fracturing Tuesday, Oct. 23, 2012. The rally was meant to push for the acceleration of clean-energy alternatives and to educate the public on what co-organizer Allison Wolff  calls the dangers of hydraulic fracturing, which involves blasting water, sand and chemicals underground to free oil and natural gas. (AP Photo/Thomas Peipert)
Actress Daryl Hannah speak at a Denver rally organized by opponents of hydraulic fracturing Tuesday, Oct. 23, 2012. The rally was meant to push for the acceleration of clean-energy alternatives and to educate the public on what co-organizer Allison Wolff calls the dangers of hydraulic fracturing, which involves blasting water, sand and chemicals underground to free oil and natural gas. (AP Photo/Thomas Peipert)
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