Question

Changing your toilet can reduce water pollution because _______.
a.
the sewage is partially treated in the toilet before entering the sewer system
b.
chemicals added by new toilets neutralize the pathogens in the water
c.
more efficient plumbing uses more water and creates larger volumes of waste
d.
more efficient plumbing uses less water and creates smaller volumes of waste

Answer 1

d. more efficient plumbing uses less water and creates smaller volumes of waste

Explanation: Low-flow or high-efficiency toilets reduce the amount of water used per flush, so less wastewater (and pollutants) enters the sewer system, lowering the load on treatment plants and the risk of overflows.