Fears of river poisoning in Malawi
25 January 2017 Last updated at 20:41 GMT
Several mining companies have set up in Malawi to exploit natural resources such as uranium and coal.
They have, however, been slow to respond to growing concerns that rivers are becoming polluted by their operations.
A village in north Malawi is living in the shadow of uncertainty, suspecting that their local water supply might be contaminated, with the health risks this brings.
Nancy Kacungira reports.