How many inches has the sea level risen so far?
Sea level in the last 100 years has risen about 7 inches and is projected to increase another 6 to 36 inches or so by 2100. The insidious thing is not so much the sea level rise, but the possibility of storm surges coupled with sea level rise. The Netherlands spent $10 billion on raising the levels of their dikes after a 1959 storm caused ocean waves to overflow the dikes causing major floods. The money was spent to raise the height of the dikes from 20 to 30 feet. Being a little above sea level is not enough.
