What is the main disadvantage against relying on desalinization?

The main disadvantage of relying on desalination is its high cost, both in terms of energy consumption and infrastructure development, making it less economically viable for widespread use. Additionally, the process produces brine, a highly concentrated salt byproduct that can harm marine ecosystems if not managed properly. Moreover, desalination plants can have significant environmental impacts, including carbon emissions associated with energy use. These factors raise concerns about the sustainability of desalination as a long-term solution for water scarcity.