The Problem(s) with Using Sludge as a Fertilizer Is/are The

Question

The problem(s) with using sludge as a fertilizer is/are the
A)presence of heavy metals and similar pollutants.
B)presence of pathogenic organisms and viruses.
C)inhibitory effect it has on plant growth.
D)stimulatory effect it has on methane production.
E)presence of heavy metals and similar pollutants AND presence of pathogenic organisms and viruses.

Accepted Answer

Sludge contains both heavy metals and pollutants as well as pathogenic organisms and viruses, making it potentially harmful to both human health and the environment. Therefore, it is not recommended as a fertilizer without careful treatment and monitoring processes.