The act of discharging or emitting substances (liquids, gases, waste); often used for emissions such as CO2 or industrial discharge.
工場から有害物質が排出されていると住民が訴えた。
Residents complained that harmful substances were being discharged from the factory.
政府は温室効果ガスの排出削減目標を発表した。
The government announced targets for reducing greenhouse gas emissions.
車の排気ガスの排出基準が厳しくなった。
Emission standards for vehicle exhaust gases have become stricter.