emission

Everyday

1. Gas, heat, light or another substance sent out into the air: car emissions. tree →
2. The act of sending something out: the emission of light from a star. tree →

In the lessons

In science and environment lessons «emissions» usually means harmful gases such as carbon dioxide from cars, factories and power stations; reducing emissions helps slow climate change. Phrases: «carbon emissions», «cut emissions», «exhaust emissions», «zero emissions».

Examples

• Cars produce emissions that pollute the air. tree →
• Electric buses have zero emissions from the exhaust. tree →
• Countries agreed to cut carbon emissions. tree →
• The emission of light from the bulb makes the room bright. tree →
• Trees take in some of the carbon dioxide from emissions. tree →
• If a car gives off 2 kg of gas a day, its emission in a week is 14 kg. tree →

Note

Countable plural «emissions» is most common. Verb: emit (emits, emitted, emitting). Do not confuse with «omission» (something left out) or «mission» (a task).