| GHGs
| Pre-industrial concentrations (ppmv*) | Recent concentrations in 2018 (ppmv*) | Atmospheric lifetime (years) | Main human activity sources | GWP** |
| Carbon dioxide (CO2) | 280 | 407.8 | Variable | Fossil fuels, cement production, land-use change | 1 |
| Methane (CH4) | 0.715 | 1.86 | 12 | Fossil fuels, rice field, waste disposal, livestock | 21 |
| Nitrous (N2O) | 0.27 | 0.3311 | 114 | Fertilizers, combustion, industrial processes | 310 |
| Hydrofluorocarbons (CHF3) | 0 | 0.05 | 270 | Electronic refrigerants | 11,700 |
| Perfluoromethane (CF4) | 0 | 0.05 | 50,000 | Aluminum production | 6500 |
| Perfluoroethane (C2F6) | 0 | 0.05 | 10,000 | Aluminum production | 9200 |
| Sulfur-hexafluoride (SF6) | 0 | 0.05 | 3200 | Dielectric fluid | 23,900 |