My Poor Almost 16 Year Old Cat Has Heart...
Animals & Nature0 min ago
No best answer has yet been selected by sunshine-kt. Once a best answer has been selected, it will be shown here.
For more on marking an answer as the "Best Answer", please visit our FAQ.Disadvantages that immediately spring to mind are the cost, the aesthetic impact on the environment, impact on any existing eco-system in the area & the potential for simply moving the problem further along the coast.
Can't think of any advantages other than protecting the area but this usually outweighs the disadvantages.