The factories should reduce the discharge of sewage and gas.

工厂应减少污水和气体的排出。

youdao

So they thought of that constant discharge of sewage at home in front of the plastic processing plants.

于是，他们想到了家门前那个不断排放污水的塑料加工厂。

youdao

And the factory not disorderly emissions, then have a diesel engine car, not paper, not random discharge of sewage.

然后，工厂不乱排放废气，开有柴油引擎的车，不乱用纸，不乱排放污水。

youdao

People living in Modbury said the discharge of sewage caused by floods in December had not been cleared.

BBC: Modbury raw sewage complaint after rain

Groundwater is polluted due to poor land practices, atmospheric deposition of pollutants and direct discharge of sewage into water bodies.

FORBES: Emerging Asia Hits a Wall of Water

The agency has identified a number of possible sources of sewage and slurry discharge, which it says can both contribute to very high concentrations of bacteria on the beach.

BBC: NEWS | UK | Wales | Mid | Beach fails EU water quality test