Respuesta :
The radiation emitted by earth is primarily absorbed by the atmosphere.
The surface of the Earth receives solar radiation that is not deflected or absorbed by the atmosphere (for example, by clouds). Only a small portion of the energy that reaches the Earth's surface gets reflected.
Around 30% of the incoming radiation is reflected back to space and does not heat the surface, leaving the other 70% to be absorbed by the atmosphere and the Earth's surface. Because it is cooler than the Sun, the Earth radiates energy at wavelengths that are far longer. Greenhouse gases absorb some of this longwave radiation, which is subsequently radiated in all directions, including downward, where it traps heat in the atmosphere.
The average surface temperature of the Earth would be -18°C (0°F) instead of the current 14°C (59°F) without this natural greenhouse effect. Due to emissions from human activities like the burning of fossil fuels, the concentrations of greenhouse gases in the atmosphere are rising, which enhances this impact.
Learn more about earth radiation here:
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