Tell Russia to stop invading their neighbours. Also I have a feeling Ukraine did a lot of work on decarbonisation of one of the biggest fossil fuel producers.

A bigger issue is actually using the weapons in conflict.

The carbon emissions produced from destroying buildings and infrastructure (which have to be rebuilt in most cases) has to be added to the emissions from producing the weapons and ammunition.

It's one big negative outcome.
It effectively produces carbon emissions and not much else.

One 155mm artillery shell could easily destroy one or two homes.