It would be all of these. During world war 2 it is the United States that supplied almost everything in the allied war effort. Also the United States take longer route and also a hard campaign to combat the German U-boat for supremacy and stable supply route for the allied forces.
They lived in what was normal in those times. The Islamic traders dealt with a wide variety of goods, including sugar, salt, textiles, and spices. The way that they lived back then allowed the traders to travel all the way from Europe to China. Also, they were most likely wealthy and powerful.
I found that from April to mid-June there's an increase in the ground level ozone which creates smog (smog is created by the emissions from vehicles and smokestacks when they come in direct with sunlight.)
Nitrogen Dioxide (NO2) It comes factories, old cars from the 1900s, etc. it is a poisonous gas that comes from old engines can when breathed into the human body it can cause loss of fatigue, restlessness, anxiety, etc.. When it is released it gets stuck into the atmosphere but still gets stuck into the air but a small amount so little it can't harm large number of humans or animals.
Physically, as well as psychologically, the Berlin Wall was significant because Berlin was the only city physically separated by the Cold War between the Soviet Union and its Eastern Bloc and Western allies. ... It was possible to limit the entire Cold War to this one nexus point. So I think it was necessary