Population growth-climate change-pollution are increasing pressures on water resources.
Fresh water resources are finite, while world human population is growing exponentially, and consequently water demand.
Climate change is statistically rising the number of catastrophic climate events, like floods and droughts, changing global distribution of water resources in both space and time, and therefore shrinking available water supply.
Pollution, related to population growth and industrialisation processes, reduces the amount of good quality water resources, necessary for drinking supply and related domestic activities.