What was one of the main reasons that large numbers of irish moved to the united states in the 18405?

Potato Blight

Explanation:

Ireland’s 1845 Potato Blight is often credited with launching the second wave of Irish immigration to America. The fungus which decimated potato crops created a devastating famine. Starvation plagued Ireland and within five years, a million Irish were dead while half a million had arrived in America to start a new life. Living conditions in Ireland were deplorable long before the Potato Blight of 1845, however, and a large number of Irish left their homeland as early as the 1820s.

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:

location is the answer to this