Wood fires are also terrible for human health
A power/heating plant with proper monitoring of the combustion and filtering of the smoke is definitely no worse than a coal burning plant.
The main reason for refurbishing coal plants for other fuels or shutting them down entirely is that coal is terrible regarding CO2 footprint.
The wood used is not fed with industrial fertilizer, it doesn't require clearing the land to grow, and it doesn't require irrigation or ongoing maintenance. 100% of the carbon it contains was sucked out of the air not mined from the foundations of the Earth. It is completely carbon neutral.
I would go as far as saying wood heat is fantastic for human health.