Which of the following methods can be used by officials to solve the problem of water pollution?

Use scientific solutions.

Stop droughts and floods.

Increase number of factories.

Dispose of chemical wastes in dustbins.

The answer is using a scientific solution, it s literally in the lesson.

"Dispose of chemical wastes in dustbins"

Chemical wastes often end up in rivers or streams. By disposing chemicals wastes in dustbins, this would ensure the waste does not end up in the water. However, the waste would need to be properly disposed of using proper containers for the waste.