Question

which is a source of water pollution?
solid waste accumulation at a landfill
black smoke released from a large truck
chemical waste discharged from an oil refinery
particulates released by burning fossil fuels

Explanation:

Solid waste at a landfill mainly affects land. Black smoke from a truck and particulates from burning fossil fuels are air - pollution sources. Chemical waste from an oil refinery can contaminate water bodies, making it a water - pollution source.

Answer:

chemical waste discharged from an oil refinery