More than 70 % of world's freshwater is contained in

Step-by-step solution

Three fourth surface of earth (about 71 % of total) is occupied by oceans which contain 97.5 % of total water. This is marine water with about 3.5 % salt contents. Rest water i.e., 2.5 % is freshwater, which occurs on land. Most amount of this water (about 1.97 % ) occurs as frozen ice caps and glaciers and 0.5 % freshwater occurs as ground water.