Why is desalination not used more often than it should?

Desalination is not used more often due to its high energy consumption and associated costs, which can make it economically unfeasible compared to other water sources. Additionally, the environmental impact of brine disposal and potential harm to marine ecosystems raises concerns. Infrastructure requirements and technological limitations also pose challenges, particularly in developing regions. Finally, public perception and policy frameworks may not prioritize desalination as a viable solution for water scarcity.