The correct answer is - B) greenhouse gasses.
Greenhouse gasses alongside the ash are a product of the combustion of biomass and wood fuels. The most common of the greenhouse gasses is the carbon dioxide (CO2). Now the releasing of it can be seen in two ways:
1. CO2 is a crucial gas for the regulation of the temperature on the Earth and keep it warm enough so that the life can be sustained, so from that perspective is good.
2. Too much of CO2 in the atmosphere contributes to rise in global temperatures and very quick dramatic changes which can have terrible effects on the whole life on our planet.
So all in all, the release of these gasses in the atmosphere is good, but only strictly regulated about the released amount of it, if it is not controlled than it can have devastating effects.
