An early problem in agricultural societies was
A. the erosion of topsoil and loss of soil nutrients.
B. the loss of wetlands and the wildlife it supports.
C.
the spread of fires from using slash and burn clearing.
D. the spread of diseases from animals to humans.

Why were americans concerned about the future of north and south america? check all of the boxes that apply. they worried that european countries would take over independent countries in latin america. they thought that european nations could threaten democracy in the united states. they believed that europe would never again return to the americas.