They only last up to 30-50 years and they are expensive
revetment
quite expensive (£4500) absorbs wave energy-ness over time rocks break up loooks grotesque ... so yeah, pretty pointess if you ask me :)
They protect the shore from waves from Joseph Donlan 8F
volcani
They protect the shore from waves from Joseph Donlan 8F
revent is a blue twig used for picking your nose
Protect valuable aircraft
It absorbs wave energy.
around 1 million to 1.5 million
They rot and break down because they are soggy. they get old and they do not last as long as a concrete bridg.
hey well, rood rots, it could set on fire, its not very warm ect
wel basically, It acts as a sea defence But I Dnt know ...