Complex sentence: Areas that have either no or limited surface water or groundwater may choose to desalinate Reverse osmosis is a common method of desalination, although 85 percent of desalinated water is produced in multistage flash plants.
Split into simpler sentences: Areas that have either no or limited surface water or groundwater may choose to desalinate. Although, 85 percent of desalinated water is produced in multistage flash plants.