This chapter advances SDGs 6 & 7 by describing the use of halophilic algae for the desalination of seawater for drinking and other uses.

This chapter advances SDGs 6 & 7 by examining the potential for wastewater to be converted into a renewable fossil-fuel alternative.

This chapter advances SDGs 6 & 7 by critically examining the recent developments, opportunities, market possibilities, and barriers in resource recovery in wastewater treatment plants.

This chapter advances SDGs 6 & 7 by discussing how to convert gelatinous industry wastewater into useful chemicals and fuels.

This chapter advances SDGs 6 & 7 by presenting membrane technologies that can be used to purify wastewater and produce biomass for energy.

This chapter advances SDG 6 by presenting an overview of a low-cost technique for investigating groundwater flow and mapping a contaminated zone in the subsurface.

Looks at the links between sustainability of water in mountainous areas and sustainability.

Links to SDG6 and the theme of WWD as it covers the presence of emerging pollutants in aquatic systems such as rivers, lakes, groundwater, glaciers, wetlands, the ocean poses significant risks to human and environmental health.

Provides some details about the hydrologic cycle and then discusses the physical geology of groundwaters.

This chapter advances SDG 6 by presenting major challenges and opportunities concerning groundwater utilization and climate sustainability.