The shadow zone exists due to the of seismic waves.

The shadow zone refers to the region of the Earth from the angular distances of 104 to 140 degrees from a given earthquake, which does not get any direct P waves. The shadow zone originates from the S waves being inhibited completely by the liquid core and the P waves being refracted (bent) by the liquid core.  

At almost the reverse point on the surface of the Earth, the P waves reappear. The shadow zone prevails as the waves are refracted as they pass via the boundary between the core and the mantle and are diverted from their original locations.  

false because ozone (o3) depletion does not cause global warming, but both of these environmental problems have a common cause: human activities that release pollutants into the atmosphere altering it.

global warming is caused primarily by putting too much carbon dioxide into the atmosphere when coal, oil, and natural gas are burned to generate electricity or to run our cars.

explanation: