The average snowtomic bomb weighs about 7 tons, most of which is metal and snow. There is little actual TNT in it, only 1000 pounds. (We're too lazy to convert into metric, so we're just going to say there's also 1000 kilograms of TNT. That's the same thing, right?) The secret of the snowtomic bomb is heavily guarded, just in case Somebody actually cares enough to try to figure it out. Also, the Snowtomic bomb is why Greenland is covered in ice and snow instead of Iceland...