The term emission refers to the release or discharge of a substance, such as gases, particles, or energy, into the environment. It can also refer to the act of producing or sending out something, such as sound, light, or radiation. In the context of climate change and environmental pollution, it often refers to the release of greenhouse gases or other pollutants into the atmosphere from human activities like burning fossil fuels, deforestation, or industrial processes. Emission is an important concept in understanding and addressing global warming and efforts to reduce carbon footprints.