What is a possible long-term effect of continued exposure to air pollution?

Actinobacteria sp. are fermenting organisms (which do you use oxygen to breathe) referred to as chemoorganohetereotrophs this means they break down organic material and convert it to inorganic material. which part of the carbon cycle does this describe

I’m stuck on this question cuz i’m stupid sksksksk

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above