Bacteria act as natures scavengers and play a vital role in the process of decay.
Bacteria are industrially important i.e. dairy, leather, curing, retting, etc.
They enhance soil fertility by their ability to fix atmospheric nitrogen.
They are used to reduce pollution levels in water especially breakdown of hydrocarbons like petroleum.
Bacteria play a vital role in the hydrometallurgical industries for the extraction of metals from their ores.
Bacteria are widely used for gene manipulation in genetic engineering experiments.