If carbon emissions continue to damage the andes mountain glaciers, the lives of millions of people dependent on the run off will be affected

Using complete sentences, describe the central economic problem facing all humans. why does this require people to make choices? how can this result in opportunity costs?

Which age groups shows the graestest diferrence between males and females

One of the main reasons societies settled along rivers in the neolithic era was because a) the village elders demanded it. b) the land there was more valuable. c) it was more safe and secure there. d) it provided irrigation for farming.