Xinhua: Bolivian President Evo Morales on Tuesday called for a world conference to discuss the effects of climate change and ways to tackle it. “Due to a historical responsibility for the mankind, we decided to summon the First World Conference of the People on Climate Change,” Morales told a press conference. He urged all leaders of the world’s indigenous ethnic groups, scientists and experts on environmental issues to attend the Conference, which was scheduled for April 20-22 in the …