How did the Grand Coulee Dam affect the environment? Check all that apply. The region's steelhead population dropped severely. S
almon were unable to travel up the river to spawn. Floods destroyed the area's surrounding forests. The region became too dry and infertile to farm. Thousands of acres of land were cleared.
to win the war, Union troops needed to invade and control an unfriendly South and subdue Confederate armies. Confederate armies did not have to conquer northern territory to win independence.
