What was the seven year war about? What were the Causes and effects

The Seven Years' War was a global conflict that was fought between 1756 and 1763. It involved all five European great powers of the time the Kingdoms of Great Britain, Prussia and France, the Habsburg Monarchy of Austria and the Russian Empire plus many of Europe's middle powers and spanned five continents, affecting Europe, the Americas, West Africa, India, and the Philippines.

Explanation:

the dust bowl, otherwise known as the dirty thirties, was a huge dust storm that killed multiple (and i mean  multiple) farmer's crops, leaving them homeless, and foodless, and jobless. in california, there were 5.7 million residents, and the population shrank as mexicans were repatriated. however, when the dustbowl happened, a lot of people began to move to california. by 1940, 250,000 people had arrived. therefore, your answer would be  the population increased, massively.  i hope this !

explanation: