How does the loss of barrier islands lead to further land loss?

Barrier islands serve as the first protection for the mainland. They take the first hit and slow down the hurricane/reduce impacts. Because of this, lack of barrier islands would cause the mainland to be flooded even more, which would cause land loss.

The industrialization of less developed nation is the common goal shared by the united states and European nation during the age of imperialism. Industrialization has extended the united states in the early 19th century and eventually spread to most western European nations before the end of century.

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