Describe the role of atmospheric carbon dioxide in
regulating earth's temperature. what happens when
excess carbon dioxide builds up?

Carbon dioxide molecules provide the initial greenhouse heating needed to maintain water vapor concentrations. when carbon dioxide concentrations drop, earth cools, some water vapor falls out of the atmosphere, and the greenhouse warming caused by water vapor drops.

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. 

Apaid their profits to high officials