Carbon dioxide
main gas responsible for global warming.
sources
- Burning fossil fuels
- respiration
Methane
Can trap 21 times more heat than the same amount of carbon dioxide. However, there is less methane than carbon dioxide.
Sources
- Landfill sites
- natural gas leaks
Nitrous oxide
Present in the atmosphere in tiny amounts but can trap 270 times more heat than the same amount of carbon dioxide.
sources
- Burning of fossil fuels
- fertilisers