Global water scarcity refers to the lack of sufficient freshwater resources to meet the demands of water usage in various regions. This issue affects billions of people worldwide, leading to challenges in agriculture, sanitation, and drinking water access. Factors contributing to water scarcity include climate change, population growth, and pollution, which strain existing water supplies. In many areas, particularly in developing countries, water scarcity can lead to severe health problems and economic instability. Organizations like the United Nations are working to address these challenges through sustainable water management practices and initiatives aimed at improving access to clean water for all communities.