File photo of former U.S. Vice President Al Gore speaking as Wangari Maathai watches after they were presented with the Chairman's award at the 40th Annual NAACP Image Awards at the Shrine auditorium

 
File photo of former U.S. Vice President Al Gore speaking as Wangari Maathai watches after they were presented with the Chairman
Former U.S. Vice President Al Gore speaks as Wangari Maathai watches after they were presented with the Chairman's award at the 40th Annual NAACP Image Awards at the Shrine auditorium in Los Angeles in this February 12, 2009 file photo. Kenyan Nobel Peace Prize winner and environmentalist Maathai has died in hospital where she was undergoing treatment for cancer, her organisation the Green Belt Movement said on September 26, 2011. Maathai, who won the 2004 Nobel Prize, was the founder of Green Belt Movement, a civil and women rights activist and also served as a Member of Parliament. REUTERS/Mario Anzuoni/Files (UNITED STATES - Tags: ENVIRONMENT SOCIETY POLITICS OBITUARY)