The solid particles that settle out from wastewater treatment tanks, called sludge, are often spread out on farm fields as a fertilizer. What risks might be associated
with this practice? Using the scientific method, identify the potential problem and outline how you would
approach answering this question. Hint: See Chapter 1, problem 47.
(1.5) Problem and hypothesis: Identify one possible risk, and then state a hypothesis based on this risk.
Risk =
Hypothesis =
(1.5) Describe a possible experiment you would do to test the hypothesis:
(1) What is then done after the experiment?