section_path: Emerging technologies/Earth infrared thermal radiation
section_name: Earth infrared thermal radiation
paragraph_text: Earth infrared thermal radiation
  
  Earth emits roughly 10 W of infrared thermal radiation that flows toward the cold outer space. Solar energy hits the surface and atmosphere of the earth and produces heat. Using various theorized devices like emissive energy harvester (EEH) or thermoradiative diode, this energy flow can be converted into electricity. In theory, this technology can be used during nighttime.