Suggest suitable mechanism$(s)$ for waste management in fertiliser industries.

(N/A) The waste management in fertiliser industries involves the following mechanisms:
$1$. Control of air pollution: Installation of scrubbers and electrostatic precipitators to remove harmful gases and particulate matter from industrial emissions.
$2$. Effluent treatment: Industrial wastewater must be treated in an Effluent Treatment Plant $(ETP)$ to neutralize chemicals and remove toxic pollutants before discharging it into the surrounding environment.