The effect of damning rivers will be to put out the fires of Hell. The wicked will go unpunished and Ryanair will start 10p trips there (plus tax). Celebrity Ninth Circle will appear on channel 4, will Satan get off with Jade?

By the way the moon is bigger near the horizon because it's cold in Outer Space, so it contracts. When it gets nearer the ground, it warms up and expands. If it came to earth on a hot day it might well pop.