So who wants to be the first to begin sending comets to the moon? Easier than sending Earth's CO2 to the moon in great abundance.
What if we miss the moon and hit the Earth with it? Of course we could set a solar powered rail gun on the comet and shoot its material at the moon in smaller quantities.
aren't there orbit entree's that would make (even a asteroid) bounce of on our atmosphere? If it happened to get to close to the earth.