Clean water is also a need for our ecosystems.

The clean water and sanitation goal is about the affordability of this resource for everyone since it is a basic need for humans and ecosystems health. However, it facing a lot of obstacles like the rising demand in water cause by the growth of the population, the growth in agricultural needs and other various sector in our modern society. This goal is also challenge by the poor management of limited water sources, the contamination of fresh water supplies and the destruction of there water-related ecosystems (United Nation. 22 march 2018).