What does it mean to emit something?

To emit something means to release or discharge it into the environment. This term is commonly used in various contexts, such as environmental science, where it refers to the act of sending out gases or substances into the air or surrounding area. For example, a car emits exhaust fumes, or a light bulb emits light. Emission implies an active process of giving off or sending out, distinguishing it from other actions like absorbing, concealing, or condensing. Understanding this definition is essential, especially in discussions about pollution and environmental impacts, where emissions play a crucial role.