The importance of the sea includes all of the following, except______.

A．society's demands upon and for clean water are increasing
B．no person has the right to waste water
C．without water, there could be no life
D．everyone should be concerned about how water is used because the water a person uses will be used by future generations

A．clear water on earth is unlimited.
B．fossil fuels and nuclear energy are more important than falling water from dammed-up rivers
C．part of the water used by a person or a community may eventually be used by others
D．most of the earth's hydroelectric potential has been exploited