No one lives at the North or South Poles. How would CFCs make their way to the poles? (HINT: CFCs are gases)

winds and atmospheric circulation move them to the poles from various locations

ocean currents move them with the warm and cold ocean waters

water vapor pushes the gases north and south

greenhouse gases push them north and south

The investiture controversy began as a power struggle between pope gregory vii (1072–85) and henry iv, holy roman emperor (1056–1106).[2] a brief but significant struggle over investiture also occurred between henry i of england and pope paschal ii in the years 1103 to 1107, and the issue played a minor role in the struggles between church and state in france, as well.by undercutting the imperial power established by the salian emperors, the controversy led to nearly 50 years of civil war in germany, and the triumph of the great dukes and abbots. imperial power was finally re-established under the hohenstaufen dynasty. historian norman cantor: