The reason for sending cluster munitions to Ukraine is that the West cannot manufacture shells anywhere near as fast as Ukraine fires them. The only way to keep Ukraine fighting is to take them from the large stockpile of cluster munitions.

I understand the logic of this, but it doesn't eliminate the danger that the unexploded submunitions will pose after the fighting stops.

I wonder if anyone has calculated what fraction of unexploded munitions left in the battlefields will come from cluster munitions fired by Ukraine. If it is a small fraction, in the end Ukraine's use of cluster munitions will not make a big difference. If it is a large fraction, then it will be the main cause of that future danger.