The world lost a remarkable person when Wangari Maathai, 71, died of ovarian cancer in September. Wangari founded the Green Belt Movement, an effort to reforest her native Kenya by paying poor women to plant trees. In 2004, she became the first African woman in history to win the Nobel Peace Prize. On the international stage, she helped cement the connection between environmental protection and peace-making, human rights and security. Today, Worldview revisits a 2007 conversation about her autobiography Unbowed. And German broadcaster Deutsche Welle profiles a young Ghanaian, Solomon Tetteh, who is making a future out of Accra’s trash heap.