Terrestrial radiation refers to the energy emitted by the Earth in the form of infrared radiation. This process occurs as the Earth absorbs sunlight and then re-emits some of that energy back into the atmosphere. The emitted radiation is primarily due to the heat generated from the Earth's surface and is a key component of the planet's energy balance. This type of radiation plays a significant role in the greenhouse effect, as certain gases in the atmosphere, like carbon dioxide and methane, trap some of this energy, helping to maintain the Earth's temperature. Understanding terrestrial radiation is essential for studying climate change and its impacts on the environment.