<span>It encouraged the development of new and different energy sources, and it also resulted in the development of new energy efficiency standards for houses</span>
There are a number of differences between World War I and II.
The primary is the origin story.
With World War I, the war broke out because of a complex web of diplomatic and military alliances that were summoned after the assassination of the Arch Duke of the Austro Hungarian Empire. It was further exacerbated by a culture of nationalism throughout Europe.
World War II broke out because of the belligerence of the German Third Reich and its allies.
Delivered from the President's Office at 8 p.m.
My fellow Americans:
Tonight I want to talk with you about the remarkable events last week in Paris, and their meaning to our future.
First, I am deeply grateful to the many thousands of you, and to representatives in Congress, who sent me messages of encouragement and support while I was in Paris, and later upon my return to Washington. Your messages clearly revealed your abiding loyalty to America's great purpose--that of pursuing, from a position of spiritual, moral and material strength--a lasting peace with justice.
~hope this helps! :) this was in my book so you can read this to help you with your question
