If the USA imported $1.8 trillion in 2016, but exported $1.2 trillion to other countries, what should be its balance of trade?

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. 

Ibelieve it would be religious 

Bringing the tradition of carnival to brazil