A World of Difference
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A line that runs from the North Pole to the South Pole that designates the point at which one calendar day turns to the next.

A term used to describe countries that are progressing economically but are still not developed enough to be considered First World or developed countries.

A term used to describe countries that are considered to be rich, affluent and have growing economies.

A measurement of the number of deaths of children under one year of age.

The economic and political alliance of most European countries.

A political belief system in which a socialist economic system is implemented to allow the state to maintain control over the means of production and to provide for the people according to their perceived needs.

A global change in mortality and fertility that occurred around 1800, but also refers to the four phases of transition.

Early maps first described in the 8th century and printed in the 15th, which depict a view from the northern hemisphere of the world as circular and surrounded by an ocean.

A separate and distinct unit of political authority.

A term popularly used during or before the Cold War, for describing communist countries.

An acronym for Brazil, Russia, India, China and (sometimes) South Africa that are grouped together due to the fact that they are all large countries with developing economies.

A term for the unplanned, often illegal, informal housing in cities that arise due to the inability of formal markets and public authorities to provide enough affordable and accessible housing. Slums are also referred to as "shantytowns," "informal housing," and "squatter housing."

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