Environmental Engineering in CE
The progressive warming up of the earth's surface is mainly due to the

De-forestation
Automobile exhaust
Thickening of ozone layer
Blanketing effect of CO₂ in the atmosphere

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Environmental Engineering in CE
Aerobic biological oxidation ponds used for the purification of polluted water

Destroys/removes pathogen from the sewage
Destroys/removes pathogen much more effectively if the sewage is chlorinated
All of these
Is not very effective for nonbiodegradable substances (e.g. ABS) containing effluents

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