Polluted water can contribute to
a. drought
b. increased co2
c. deforestation
d. glacial melting

Polluted water can contribute to : deforestation

Water is the most essential substance that needed by the trees within the forest to sustain their living.

When the source of water is contaminated, the trees wouldn't be able to gain enough nutrients for their photosynthesis, which will eventually kill them.

C. deforestation is your answer