About half the world's population depends on what staple as its principal source of food?
Name the river that flows eastward across western Africa to its delta in Nigeria.
Name the valley that is the center for iron and steel production in Germany and is also the most densely populated area of Germany.
The kiwi, a flightless bird with a long beak it uses to find insects and worms, lives in which country in the Southern Hemisphere?
IN what present-day country did the temple of Angkor Wat lie overgrown by vegetation for 400 years?
In July 1999, a peace treaty for Sierra Leone was signed in Lome, the capital and port city of which West African country that lies between Ghana and Benin?
The Union Jack appears on the flags of several countries, due to their previous rule by which country?
Tegucigalpa is the capital of which Central American country?
The largest hole in Earth's vital ozone layer is located over what continent?
Bengal is a region of both India and what other country that border the Bay of Bengal?