What would happen if the whole world desalinated water?

If the whole world desalinated water, it could significantly alleviate water scarcity issues in arid regions and improve access to fresh water. However, large-scale desalination would require immense energy resources, potentially increasing carbon emissions if fossil fuels are used. Additionally, the disposal of brine, a byproduct of desalination, could harm marine ecosystems if not managed properly. Overall, while it could address immediate water needs, the environmental and energy implications would need careful consideration.