* Headlines for April 21, 2010 * Bolivian Indigenous Activists Call for End to Polluting Extractive Industries Inside Bolivia * Evo Morales Opens Climate Change Conference in Tiquipaya * "The Most Important Event in the Struggle Against Climate Change" - Nigerian Environmentalist Nnimmo Bassey on Bolivia Climate Conference * "The World Is Changing in a More Progressive Way, and It's Taking Place Here" - Boaventura de Sousa Santos on Bolivia Climate Summit * Why Is the US Cutting Off Climate Aid to the Poorest Country in South America? - Bolivian Climate Negotiator Angélica Navarro