Compare and Contrast the history of The Caucasus and Eurasian Republics.

These republics span the Caucasus region, central Asia, and parts of Eastern it is a common skill applied in historical analysis to examine change over time.

Explanation:

worldwide, 780 million people do not have access to an improved water source. an estimated 2.5 billion people lack access to improved sanitation (more than 35% of the world's population)