Why are government laws and agencies needed to monitor our impact on the environment?

Restricting immigrants from entering a country may be based on what belief?  

Identify the constitutional principle that is common in both this excerpt and federalist no. 51. based on the constitutional principle identified in part (a), explain how the perspective in this excerpt compares with the perspective in federalist no. 51. explain how the constitutional principle identified in part (a) is reflected in the constitution, including two examples to explain how it affects the u. s. political system

What caused the settlement of more african americans in the mississippi alluvial plain region then in the ozark mountains region?