Which of the following eventually resulted in niagara falls’ love canal neighborhood being declared a federal emergency in 1978? a. oil drilling in the area had destroyed its ecosystem. b. a neighborhood there had been built over a toxic dump. c. a large amount of iron, zinc, and lead mining had poisoned the water supply. d. there had been an accident at a nearby nuclear power plant.

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. 

D. a mountain abd are made by volcanos and tectonic plates