Which of the following is not a greenhouse gas?
Carbon dioxide
Nitrous oxide
Methane
Sulphur dioxide
Carbon dioxide, nitrous oxide, and methane are all greenhouse gases, which means that they can trap heat in the Earth's atmosphere and contribute to global warming.
Sulphur dioxide, on the other hand, is not a greenhouse gas. While it can contribute to air pollution and acid rain, it does not trap heat in the atmosphere in the same way that greenhouse gases do.
It's worth noting that while sulphur dioxide is not a greenhouse gas, it can still have negative impacts on the environment and human health.