For context, increased concentrations of greenhouse gases, including CO2, are responsible for approximately all of the warming that has happened in recent decades: Image
With carbon dioxide being the largest part of that: Image
And human burning of fossil fuels (as in power plants) is substantially responsible for that increase:
Based on multiple lines of evidence using interhemispheric gradients of CO2 concentrations, isotopes, and inventory data, it is unequivocal that the growth in CO2 in the atmosphere since 1750 (see Section TS.2.2) is due to the direct emissions from human activities.