Water occupies 71% of our planet. About 96.5% of the water found on Earth is not readily available for human consumption, and resides in the oceans and seas. Out of the remaining 3.5%, 1.7% can be found in groundwater, 1.7% in glaciers and ice caps in Antarctica and Greenland and 0.001% in the air as vapour and clouds. Water moves continually through the water cycle of evaporation and transpiration, condensation, precipitation and runoff, usually reaching the sea. Whereas evaporation refers to the phase shift of any liquid to gas, transpiration is the process of water movement through a plant. Runoff is the flow of water over the Earth's surface. It's created when too much rain falls, and there is no more room in the soil to absorb more water. One of the reasons seas are salty is because they contain large amounts of highly soluble salts (such as sodium and chloride) which were washed away by runoff water on its way to the sea.
Question: Taking into account the water found in ice caps in Greenland and Antarctica, water constitutes over 71% of our planet.
Options:
A. true
B. false
C. uncertain
Answer: B