I think the current air pollution deaths of fossil fuels (several millions per year) are roughly an order of magnitude higher than even expected climate change deaths.

Many of the big estimates of death rates in say 2100 combine the air pollution of continuing to use coal and combustion engines with heat and climate effects.

The good news is that we have cheaper, better, cleaner options for the vast majority of that fuel burn today and they continue to get better, cheaper and cleaner. There's a clear shift in the market, it just takes time to work it's way through.

But if your kid has asthma today then that is probably doing more damage to them than climate change.

Of course, to state the obvious, both problems have the same solution. Stop burning fossil fuels.