The boreal forest region is the largest in terms of raw acreage of trees and therefore was the most resources in that respect. As for which has the largest impact to the world's overall economic health, I would have to say rainforests have had the greatest impact. Boreal forests are mainly used for lumber, while tropical rainforests have contributed various spices, foods, a large variety of medicines, as well as lumber.
Rainforests could very well continue to provide additional valuable goods in the future.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.