How does the atmospheric greenhouse mechanism physically differ from the trapping effect in a glass greenhouse structure?

Answer

The atmosphere restricts the planet's ability to radiate heat back into space

While a glass greenhouse primarily blocks convection, the atmospheric mechanism relies on greenhouse gases restricting the planet's ability to radiate longwave infrared energy back into space.

How does the atmospheric greenhouse mechanism physically differ from the trapping effect in a glass greenhouse structure?
Earthclimateatmospheregreenhouse effectwarming