The earth is has a temperature and is characterized by the system of the heat budget that acts as a balance to the flow of the heat with the earth's latitudes.
Thereby it keeps the earth warm form within and also filters the UV radiation and also provides water in the form of the rain.
The entire atmosphere act as a filter to the solar radiation that falls on the earth and thus acts shield to protect the planet.
The Great Rift Valley is currently in the process of splitting the African plate into two different plates, and it's a divergent boundary, moving the Somalian, Arabian and Nubian plate away.
