The Greenhouse Effect
The greenhouse effect is a natural occurrence that maintains Earth's average temperature at approximately 60 degrees Fahrenheit.
Under normal conditions some of the sun's heat is radiated back into space
The 'Greenhouse Effect' occurs when heat is trapped in the atmosphere by gases
The greenhouse effect is a necessary phenomenon that keeps all Earth's heat from escaping to the outer atmosphere. Without the natural greenhouse effect it is certain that life on Earth would be difficult to sustain.