Freshwater depletion alone causes extinction.
Qureshi ’21 [Waseem; Spring 2021; Ph.D. and LLM, Law Degree from Lincoln’s Inn, Advocate Supreme Court of Pakistan; George Washington Journal of Energy and Environmental Law, “International Law and The Threat of Water Wars,” vol. 12]
In the current era, freshwater resources are becoming scarce. Per an estimate by the United Nations, almost 1.8 billion people will be residing in water-scarce regions by 2025 with parts of Asia under particular threat. This scarcity is primarily due to the finite nature of freshwater resources on earth, compounded by the growth in population and climate change, which are increasing the per capita demand for freshwater. Consequently, the limited supply of freshwater resources is unable to meet the growing demand. Because of this, it is feared that nations may come to blows to secure larger shares of water for themselves or to acquire control over foreign freshwater resources. As freshwater is essential for the existence of life on Earth, it is vital that proper water conservation techniques be adopted to preserve, sustainably manage, and develop existing freshwater resources.