How does the greenhouse effect contribute to global warming? Explain.

(N/A) Visible light from the sun reaches the Earth and warms it.
When the Earth cools down,it emits energy in the form of infrared radiation,which has a longer wavelength and heating effect.
These infrared rays are absorbed by greenhouse gases like $CO_2$ and water vapor.
This absorbed heat is radiated back to the Earth's surface,increasing the overall temperature.
If the solar energy reaching the Earth remains constant but the concentration of $CO_2$ increases,the amount of heat trapped also increases,leading to global warming.