- uploaded: Jun 22, 2012
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On Wednesday, 17-year-old environmental activist Brittany Trilford of Wellington, New Zealand, addressed more than a hundred heads of state at the opening plenary of the Rio+20 U.N. Earth Summit, the largest United Nations gathering ever. "We are all aware that time is ticking and we are quickly running out," Trilford said. "You have 72 hours to decide the fate of your children, my children, my children's children. And I start the clock now."