Glossary

At the end of each definition in this Glossary there is a number in brackets. This indicates the number of the Study Session where the term is first used in this OpenWASH module.


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H

hazardous waste

waste that contains potentially harmful material, for example, toxic, infectious, corrosive, explosive, or flammable materials (1)



heatwave

when the daily maximum temperature of more than five consecutive days exceeds the average maximum temperature by 5oC (10)



heavy metals

group of toxic chemical pollutants that contain compounds of persistent metals such as mercury, lead, cadmium, nickel, chromium and others (7)



human development

continuous improvement of human well-being and quality of life (3)



Human Development Index (HDI)

composite index of human well-being that is based on life expectancy, education levels and standard of living (3)



hydrology

the study of water (4)




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