It’s well known that in the 1840s, Ireland suffered from a disaster known as the Irish potato famine.
“Famine” means a “shortage of food.”
More than a quarter of the population of Ireland died or left the country from 1845 to 1852 because of the famine.
For much of the country at the time, potatoes were the main source of food.
The famine had a big effect on Ireland; for one thing, its population is not yet back to pre-famine levels.
The famine happened because the country’s potatoes caught a disease.
At the time, no one knew what the disease was or how to cure it.