Earth Day: World leaders planting trees (21 images)

In celebration of Earth Day on April 22, this UPI photo collection shows leaders around the world -- from Pope Benedict XVI to Prince Harry -- who aren't afraid to get down and dirty with nature.
Updated: April 20, 2012 at 4:43 PM
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Prince William and his wife Kate attend a tree-planting ceremony at Rideau Hall in Ottawa, Canada on July 2, 2011. UPI/Christine Chew
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