Answer: Democratic Republic of Congo
Notes: Kasai River is located in the Democratic Republic of Congo. It was seen in the news because the Kasai River had turned red recently. The bodies of hippos and dead fish were seen floating in the river. The pollution was first detected in a tributary of the Kasai River, named the Tshikapa. The Kasai is a tributary of the Congo River. The pollution originates from a major spill at three mining facilities around in Angola. Researchers also fear the potential for lasting contamination of groundwater.
