To mine raw materials and enslave people for cheap labor.
The radiation left after the war. Along with the many people who died thereafter for many years. This also caused a nuclear war of sorts later on with Russia.
Answer:
Durian is a native fruit of Asia and many people dislike it due to the smell. But Durian is prominent in countries like Indonesia and Philippines. It may be unusual for us but to them, Durian is like our favorite foods here in the west. To know about unusual things in general gives us a more open idea that the world has more to offer.
Enslaved workers supported the Southern economy because they harvested crops on the southern plantations, and this helped the South's agriculture-based economy.