sentences:  From its origin, the Netravathi flows west, passing the towns of Dharmasthala and Mangalore before joining the Arabian Sea.Iron ore was being mined in this area by the Kudremukh Iron Ore Company Ltd (KIOCL) despite the area being part of a national park.Environmentalists raised concerns about this, since they felt that the mining was disturbing the sensitive ecological balance in the region and also polluting the rivers, mainly the river Bhadra.