According to the United Nations Secretary-General Ban Ki-moon “there is still enough water for all of us – but only so long as we keep it clean, use it more wisely, and share it fairly.”
The world has adequate global freshwater resources used in part by humankind and by the natural environment. But water is a local public good, because freshwater resources are very difficult to transport, as they are unevenly distributed among the regions of the world and within countries. As freshwater resources are limited in quantity and badly managed, they are increasingly threatened by human, industrial and agricultural pollution. Population pressure and urbanization are heightening these tensions.
The impact of climate change on the water cycle is increasing its variability
and complicating its management. Certain regions are badly affected,
which brings about changes in habitat and demographic distribution.