Because the weather on Earth is the human temperature. readjustment more than deserving conditions. There is also a primary factor in adequate living needs such as food, dress. The water and air.
The weather on Earth, with temperatures that humans can not be reconditioned very unreasonable. There was also a major factor in their survival needs such as adequate food, clothing, water and air.
Because the weather on earth has a temperature that humans can live without the excessive deserve. There is also a major factor in living adequate to the needs, such as food, dress, water and air.