Communities around Peru have long been skeptical of the benefits of mining to their lives. But they are growing bolder about their demands under socialist President Pedro Castillo.
The blockade, in place since Nov. 20, threatens to halt output at the Chinese-owned mine in southern Peru, which produces some 2% of the world's supply of copper.
Researchers at the University of Queensland and the University of Geneva are looking into a material produced from mineral ores as a sustainable source of sand.