Question

What are the two principal source of fresh water on this planet​

Answer 1

Answer:

About two-thirds of the Earth's surface is covered with water. Of this, around 97.5% by volume is held in the oceans as salt water; only 2.5% is fresh water and only a very small fraction of this is accessible as a water source. Surface water, groundwater and rainwater are our main sources of water.

Answer 2

Answer:

groundwater aquifers and surface water resources