You may have noticed that there is an increase in reservoir water usage. This is not a mistake! During this time period, many dams were built on rivers, increasing the number and size of reservoirs.
How could the reservoirs lose water?

The reservoirs could lose water through evaporation. ... Water usage didn't increase even as the population grew because people were more efficient in their water usage.

every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. therefore, there must be the same number of atoms of each element on each side of a chemical equation.