The greenhouse gases among the four listed gases are CO2 and H2O.
- Carbon dioxide (CO2) is a greenhouse gas that is released into the atmosphere through human activities such as burning fossil fuels and deforestation. CO2 molecules absorb and emit infrared radiation, which is the type of energy that gives us the sensation of warmth. When there is too much CO2 in the atmosphere, it can cause the Earth to become warmer.
- Water vapor (H2O) is a natural greenhouse gas that is present in the Earth's atmosphere. Water vapor molecules also absorb and emit infrared radiation, and they play a significant role in regulating the Earth's temperature. However, human activities are not significantly increasing the amount of water vapor in the atmosphere, so it is not considered to be a significant contributor to climate change.
- Nitrogen (N2) and oxygen (O2) are not greenhouse gases because they do not absorb and emit infrared radiation.
