Use the passage to answer the question.
Within three years, two-thirds of the world’s population is expected to face water scarcity. Since showering accounts for nearly one-fifth of all residential water use, one way that we all can help to mitigate this problem is by installing low-flow showerheads. While the decreased flow can be something that requires acclimating to, anyone will agree that saving nearly 50 percent off your water bill—as well as saving the planet—is a welcomed change.
A student is developing a counterclaim to this argument. Which counterclaim is the fairest and most effective?
The majority of building codes require shower valves that can accommodate changes in system pressure, which low-flow showerheads typically cannot meet.
Anyone who’s ever used a low-flow showerhead can tell you that the water takes forever to heat up, so unless you like cold showers, they don’t use less water.
Standard showerheads use 2.5 GPM, while low-flow showerheads have to use 2.0 GPM or less—which doesn’t amount to that great a difference.
Many utility boards offer rebates to customers who are willing to install low-flow showerheads, and the costs of these are passed on to other customers.