You will be given a definition of a task first, then some input of the task.
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

Municipal type of pollution comes from sewage, storm drains, septic tanks, boats, and runoff from yards.
Output:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
What type of pollution comes from sewage, storm drains, septic tanks, boats, and runoff from yards?