Why is the black earth region in russia called black earth?

The continental divide a divides the united states into east and west b. divides the united states into north and south c. divides the flow of river systems in the united states into east and west d. is a series of rivers and mountains that separates canada from the united states select the best answer from the choices provided.

Uranium is a mineral which is used to generate electricity. predict and explain the long term effect on the environment of obtaining and using uranium as a source of energy.

2/6 of be by to 2/6 is to 24/72 ?