sea, buryingrs at a huge pipe three meters underground to pump sand.h day, it gathers up to 10 kilos of ore, a very good yield. [speaking foreign language] >> this area is extremely rich in tin. that is why we come here. the large rafts are further offshore. [speaking forereign language] >> sedimentation is having a catastrophic impact on the bangka echo system. debt ecosystem. it covers -- sand covers everything, including coral reefs which die. fish are forced to change habitats and move further offshore. there has been a decrease in the population of fish on the island , especially near the mines. forced to castst their nets beyond the drilling area has come at impact on bangka's ecosystem has been devastating -- fishermen has been devastating. before, fishing was abundant. we caught squid right near the shore. with the mines, it is more and more difficult to fish for squid and other species of fish that we no longer see. >> three months ago, he expressed his anger with a group of other fishermen, protesting outside the governor's palace and demandi