For context, increased concentrations of greenhouse gases, including CO2, are responsible for approximately all of the warming that has happened in recent decades:

With carbon dioxide being the largest part of that:

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. The combustion of fossil fuels and land-use change for the period 1750–2019 resulted in the release of 700 ±75 PgC (likely range, 1 PgC = 1015 g of carbon) to the atmosphere, of which about 41% ±11% remains in the atmosphere today (high confidence). Of the total anthropogenic CO2 emissions, the combustion of fossil fuels was responsible for about 64% ± 15%, growing to an 86% ±14% contribution over the past 10 years.