Wherever did you get the idea that Argon is a greenhouse gas? It isn’t — and neither is oxygen or nitrogen.
Argon is used in double and triple pane windows because of how well it insulates against heat loss through windows. If CO2 is better why don’t window manufacturers use it? Look up the details on how well argon and CO2 transfer heat and compare them.
0.04% of the Earth’s atmosphere is CO2. Argon is right about 1% which is over twice the amount.
If the Leftist didn’t have an agenda for destroying America and ridding the world of humanity and were honest with themselves and others you would have seen them on the warpath to reduce argon emissions in whatever is creating it.