May 29, 2017
A large water body which is surrounded by land is called a lake. Most of the lakes are permanent, while some contain water only during the rainy season. Lakes are formed by the action of glaciers and ice sheets, by wind, river action and by human activities. There are about 500,000 lakes on Earth, storing volume of water equalling 103,000 cubic Km. Most of the world's water lakes are found in North America (25%), Africa (30%) and Asia (20%).