The greenhouse gas that has been the most directly connected to the combustion of fossil fuels is ________ and the greenhouse gas that has stabilized in the lower atmosphere is ________.
CO2; CFC N2O; H2O CO2; CH4 H2O; CH4 CH4; CFC
The greenhouse gas that has been the most directly connected to the combustion of fossil fuels is CO2 (carbon dioxide), and the greenhouse gas that has stabilized in the lower atmosphere is CH4 (methane).
So the correct answer is: CO2; CH4.