katiejackson070 katiejackson070

11-08-2017
Advanced Placement (AP)

contestada

Which of the following events happened first?

Earth Day celebrated

National Park Service formed

World human population reached one billion

The term "smog" used for the first time

United States Clean Water Act passed

Respuesta :

carsenholden7 carsenholden7

11-08-2017

World human population reached one billion

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Student118 Student118

17-09-2019

The answer is world human population reached one billion.

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