In the 1840"s Ireland faced a disaster when it 'potato crop was struck by the Potato Blight, a disease making potatoes inedible. .....More than a million Irish starved to death. Another half million Irish were evicted from their cottages. Driven by this environmental disaster, many Irish emigrated to "America. Mastering the TEKS in World Geography- Jarrett Publishing Company.
The event described is best described as_: