Given the task definition and input, reply with output. In this task, you are given a question and answer for that. The answer will fill in the blank or will complete the unfinished question. Your task is to provide an explanation based on the given question or fill-in-the-blank statement, and answer.

Question: Milo loves to dig wells for a living. If he needs to dig a well less deep to reach water, what does that do to the money and energy it takes to dig the well? 
 Answer: decreases

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
As the water is pumped out, the water table slowly falls, requiring wells to be dug deeper, which takes more money and energy.