is a term used to describe changes in the normal cycles of the Earth's climate that are attributed to human activity.

Sink holes may eventually for to join a. wide valleys b. zone of aeration c. dripstones d. aquifer

Those who hope that land reform will end the problem of mass poverty and social inequality throughout middle and south america often cite as one of the causes of the problem. a. asian immigrants b. the indigenous population c. european systems of landholding d. the power of the roman catholic church

Modern democracies function as republics in which elected officials make decisions for the majority of the people.