In the process of electrolysis, current can flow through a liquid because

a. cations of the electrolyte accumulate at the positive electrodes.
b. negative ions are attracted to the anode.
c. hydrogen is electrically neutralized in the solution.
d. water molecules become negatively charged.

According to the passage, which of these is true about gray water systems? a) gray water systems use plants that require less water. eliminate b) gray water systems require the use of less fossil fuels. c) gray water systems reduce the amount of fresh water used. d) gray water systems reduce the amount water used by shower heads.