4.The geosphere has the following features to support life on earth except A Its magnetic field. B It houses the biosphere C. It is covered mainly with water D. It serves as a major source of energy. 5. Of the following features of the earth, which must be maintain to prevent skin cancer? A Ozone B. Waters C. Vegetation D. Land structures
Solar energy is created by nuclear fusion that takes place in the sun. It is necessary for life on Earth, and can be harvested for human uses such as electricity.
