A waste picker searches for recyclable materials at the main landfill in Managua, Nicaragua, Thursday Dec. 2, 2010. Taking on companies building incinerators to burn landfill trash, waste pickers are making their voices heard at the United Nations Climate Change Conference in Cancun, Mexico, demanding access to the waste now being trucked to incinerators. Fifty million people worldwide depend on scavenging for a meager livelihood. (AP Photo/Esteban Felix)