2.5% is available as fresh water.
Factors responsible for decline in freshwater include:
Increased Food Requirements of a Growing Population. About 70% of the world's freshwater consumption is for agriculture and food demand is rising. ...Increased Energy Requirements by a Growing Population. ...Increased Frequency of Droughts. ...Groundwater is Being Pumped at Unsustainable Rates. ...Inadequate Water Infrastructure. (seametrics.com)