Use the drop-down menus to select the part of Earth best described by each phrase.

What id the primary human cause of the global warming a. storage of nuclear fuel rods b. burning of fossil fuels c. building of high-density housing d. violent conflicts over natural resources

Which event had the greatest impact on culture of south america

Countries in this region are trying to achieve development. a. attainable c. sustainable b. suspendable d. intangible