Desalination plants are crucial installations in the Arabian Gulf, providing fresh water for millions in the region to use in their everyday lives.
Vast quantities of seawater are sucked into the plants, which are energy intensive and environmentally destructive. But with water scarce, businesses are looking to alternatives to supply their needs, including wastewater-recycling systems.
Al Jazeera's Nick Clark reports from Qatar.
Source: Al Jazeera