In many regions, water insecurity is exacerbated by a combination of natural environmental conditions and human activities. Which of the following represents a human cause of water insecurity?
High rates of potential evapotranspiration exceeding annual precipitation.
Rapid percolation of rainwater through highly permeable limestone strata.
Contamination of local aquifers by agricultural pesticide runoff and industrial effluents.
Desalination of seawater to provide potable water to coastal urban areas.
