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Final answer:Net radiation (NET R)refers to the balance between all incoming and outgoing radiation at Earth's surface. Influenced by factors like cloud coverage and atmospheric gases, it maintains Earth's average temperature via the greenhouse effect.Explanation:Net radiation, or NET R, primarily refers to the balance of all incoming and outgoing radiation on Earth's surface. Earth receives almost all its energy fromsolar radiationand reflects some of it back to space, thereby establishing a balance. However, the rate of energy transfer is less than expected due to the sun's size in relation to the Earth.Various factors influence this energy balance. For instance, Earth's emissivity, averaged at 0.65, is influenced by cloud coverage that can significantly reflect radiation back into space. Furthermore, gases in the Earth's atmosphere, primarily CO₂ and H₂O, absorb most of the infrared radiation emitted from the Earth and then re-radiate this energy back to the Earth or into outer space. This interaction is known as thegreenhouse effect, a phenomenon directly responsible for maintaining the Earth's relatively constant temperature.Overall, the net rate of heat transfer by radiation is determined by both the temperature of the object (the Earth) and that of its surroundings (sun and space), creating a balance that maintains the Earth's average temperature.Learn more about Net Radiation here:brainly.com/question/20286676#SPJ11...