[ConnorBoyd]

It's called the "greenhouse effect" because the CO2 traps heat in the earth's atmosphere, just like the walls and roof of a greenhouse trap the heat inside the greenhouse. Greenhouses are also enriched with extra CO2 to boost yields, but that's not why it's called the "greenhouse effect"

[seibelj]

My point was that we refer to “greenhouse gasses” and “greenhouse effect” because these are associated with what happens in greenhouses because plants grow better in them.