Which of the following statements regarding water conservation is not true? a. only about 1% of earth’s water supply is usable for human consumption. b. over half of the states predict water shortages by 2013. c. while environmentally beneficial, water conservation is a costly endeavor. d. failure to conserve water will lead to more water contamination.

The correct answer is C. While environmentally beneficial water conservation is costly endeavour.

We can say that it is only one percent of earth's water supply which is usable for human consumption.

If we do not conserve water it will lead to a lot of water contamination. Water conservation can include activities, strategies and policies which are termed as sustainable to manage.

If we conserve water, there is availability of water which can be used in the future. If we conserve water, we also conserve energy and also habitat conservation.

c. earths continental crust is thicker than its lithosphere.

because, the lithosphere is the outermost layer of the earth/ 100 km thick and is defined by its machanical properties.the lithosphere contains oceanic and continental crust that varies in age and thickness across locations and geologic time. the lithosphere is the coolest layer of the earth in terms of temperature. the term lithosphere should not be confused with the use of "geosphere" which is used to indicate all of earth systems, including the atmosphere, hydrosphere   and biosphere. the surface of the earth can be divided into the continental crust and the oceanic crust.   the continental crust is made mostly of granite while the oceanic crust is made of basalt. the average thickness of the continental crust is 25 miles and the average thickness of the oceanic crust is 5 miles.   three types of rock, igneous, sedimentary, and metamorphic, make up the surface of the earth. that's why 3 option is preferable.

what is the statement?