Concept:
Greenhouse gases trap heat in the Earth's atmosphere, leading to the greenhouse effect.
Step 1: Major greenhouse gases.
- Carbon dioxide (CO$_2$)
- Methane (CH$_4$)
- Nitrous oxide (N$_2$O)
- Water vapour (H$_2$O)
- Chlorofluorocarbons (CFCs)
- Ozone (O$_3$)
Step 2: Role.
These gases absorb and re-radiate heat, increasing the Earth's temperature.
Step 3: Conclusion.
Thus, greenhouse gases like CO$_2$, CH$_4$, and others are responsible for the greenhouse effect.