If you could please include a little more about the question, you could get a more reliable answer.
Explanation:
WW2 was started by Germany much like WW1. After WW1, restrictions were put on Germany against military build-up. After Hitler came into power, he openly disobeyed this restriction. After invasions of near countries, war was declared.
Answer:
polluting gases and smoke from factories
Answer: so that way other country's would be scared of Iraq and wouldn't try to retaliate against his acts of terrorism
Explanation: