Nearly 97% of the water on Earth is unusable by humans because of its salinity. This lack of usability is due to the fact that water is primarily found in the oceans, which contain high concentrations of salt.
Select the correct answer from each drop-down menu.
Complete the sentences about water sources on Earth.
Nearly 97% of the water on Earth is unusable by humans because of its
salinity
. This lack of usability is due to the fact that water
.
1 answer