Which of these has been controlled in an attempt to reduce the depletion of ozone in earth’s atmosphere?
methods of filtering gasoline
use of chlorofluorocarbons (cfcs)
use of mercury (hg) compounds
methods of radioactive waste storage

The answer is atmosphere. there are four spheres of the earth: 1. geosphere (from greek word 'geo' = ground), 2. hydrosphere (from greek word 'hydro' = water), 3. biosphere (from greek word 'bio' = life), and 4. atmosphere (from greek word 'atmo' = air). a magnetosphere is a region of space around astronomical objects controlled by the magnetic field of that object. through the process of elimination, since lightning is present in the air, it can be found in the atmosphere.