What is the reason for depletion …

Causes of water pollution.

• Untreated sewage and effluents from cities are discharged into this river.
• River is used by people for bathing and washing clothes, also for bathing their cattle.
• Cremation of dead bodies on the banks of the Ganges is an age old practice, and this practice pollutes the river water.
• Rivers are preferred for immersing idols, flower and many other leftovers of rituals and worships.
• Many industrial towns are situated on the banks of this river, e.g. Kanpur.
• There are about 5000 industrial units in Kanpur; which include fertilizer, tanneries and paint industries. These factories release harmful chemicals into this river.
• Rampant use of weedicides, pesticides and chemical fertilizers pollute river water and groundwater.

Causes of ozone depletion:

• Methyl bromide
• Nitrogen oxides released from freezers, air conditioners, aerosol products and industrial solvents
• Compounds such as CFCs break down into chlorine atoms in the atmosphere. These chlorine atoms break down O₃ into oxygen (O₂) and nascent oxygen (O).