Mining giant Rio Tinto has temporarily suspended construction of a processing plant in northern Peru because of protests...Rio Tinto began building in the coastal region of Chiclayo earlier this year. The company has said the plant, which would test minerals, is key to a pre-feasibility study of its mammoth copper project, La Granja. Protesters threatened to invade the miner's installations...Activists are worried the project will harm the environment, sap water from local producers and generally, create conflict.