Simon bolivar dreamed of a united states of south america. what made that dream impossible besides geography?

a. bolivar himself became a dictator.
b. the new governments were having financial difficulties.
c. there was jealousy and distrust among the national leaders.
d. all of the above

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:

only about ten percent of the energy at one trophic level is passed on to organisms at the next trophic level. the remainder of the energy is used in life processes or lost as heat.