Answer to Question 1
Point source is water pollution that is from a specific place. For example, a factory that dumps waste in a river is a point source. Nonpoint means that pollution does not come from a single point but from a wide area and is difficult to identify.
Answer to Question 2
In a cycle known as the hydrological or water cycle, water is constantly cycled through the process of evaporation, condensation, and precipitation. Precipitation from rainfall or through melting snow eventually winds up in storage. Storage takes place in surface water and groundwater. Water collects in surface storage and streams that empty into lakes or oceans. Groundwater is under the surface of the ground and makes up the water table that supplies wells. This water is stored in rock, sand, or gravel formations.
Male tule elk in Point Reyes
Ocean water flows vertically and horizontally, influencing climate
Controlling access to water in order to gain political and strategic advantage in Gaza
A Well of Sources for Bottled Water
Elephant herd drinking at water hole. Botswana
Water-conserving structures in a transverse section of pincushion leaf (Hakea laurina)