H)
And how is that levee system worth it? Again, _*thousands_* of miles of coast to cover, and a levee requires more money and material to build than a wall (plus what it'd take to maintain it against the erosion). Do you have any idea of how big a price tag that represents? Even if you were to funnel the whole military budget into it, I highly doubt the economy could shoulder such a burden.
And that's also discounting how such a massive build would disrupt the coastal ecosystem either.