Water is essential to all aspects of life and as a result, so too is water treatment. Tony Wheatley explains why, and where gases are involved.
Globally it is estimated that 1.8 million deaths were caused by waterborne diseases in 2006, mainly due to inadequate or non-existent public sanitation facilities.
Reliable data to indicate what proportion of wastewater collected in sewers is being adequately treated is not available in many developing countries.
According to public-contributed online encyclopedia Wikipedia, only 15% of the wastewater collected in Latin America goes through a treatment process and in Venezuela, 97% is discharged as raw sewage into the environment.
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