Building through the Sierra Nevada Mountains was very difficult and dangerous. Temperatures were freezing during the winter and in one year alone there were 44 storms.There was the great danger of an avalanche for the men working through 18 feet of snow and camping on the tunnels beneath it. Creating tunnels through the mountains required blasting with nitroglycerin. Advancing at one foot of mountain at a time, a total of 11 tunnels was created.
Answer:
It reaches carrying capacity.
Explanation:
It can no longer carry for the lack of resources.
Answer:
D it reminded people that a nuclear war would be devastating for everyone
Explanation:
Answer:
has a cumulative balance of payment surplus.
