The obvious case is the consequence of climate change, where my emissions of greenhouse gases affects your sea level and climate (and vice-versa). aerial or marine pollution and overfishing in the oceans are others.
In a more restricted sense, one nation may hold all or most of a resource needed by all. Many nations are unable to feed themselves, at least to present standards, and therefore need to trade with others.
The car had a big impact on the world as we know it. helping people transport from place to place at a much faster time
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People were hopeful and convinced it was the last war.
Explanation:
because there was a World War ll
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Both of them were dictators.
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could you post a pic of the drop down menus?