What gas is causing global warming?
Actually, you are asking a loaded question. You make a broad assumption that global warming is “caused” by a gas, leading all answers to name the culprit gas. Most of the most recent scientific evidence studying climate change suggests that solar activity is the primary causal agent. This does not contridict previous answers indicating that CO2 is a greenhouse gas. It is. However, I would refute the claim that it is the PRIMARY greenhouse gas, and suggest that Water Vapor is the PRIMARY greenhouse gas, and that CO2 is a trace gas, which represents only about 5% of the total combination of greenhouse gases in our atmosphere. I would also refute the claim that CO2 is a driver of climate change, and suggest that the science be re-examined.
