Many communities are beginning to use sludge on farm fields.What is the biggest problem with using sludge on fields?
A)The sludge must be dried before it can be applied to the fields.
B)Wet sludge may irrigate the crops.
C)Sludge is often contaminated with toxic metals that could be taken up by plants.
D)Sludge is a source of nutrients and humus.

Question

Quizplus · Accepted Answer

The biggest problem with using sludge on farm fields is that it is often contaminated with toxic metals that could be taken up by plants. This can potentially harm both the crops and the people who consume them. A thorough analysis of the sludge must be conducted before using it on fields to ensure it is safe for both plants and humans.

Many Communities Are Beginning to Use Sludge on Farm Fields