With half of west africa's population, which country experienced so much bad government that it went from an oil-rich, middle-income country to one of the world's poorest?
a. ghana

The answer of the question "With half of West africa's population, which country experienced so much bad government that it went from an oil-rich, middle-income country to one of the world's poorest?" is Niger. Niger's oil deposit was discovered around 1970s.

Humans have survived and thrived in mexico city by using technology to create greater access to land. when the spanish conquered the aztec capital, tenochtitlan, in the 16th century, they built mexico city by draining the lakes and filling in the lake water to create more arable land for agriculture. this technique of land reclamation has continued to be fundamental to human civilization in mexico city.