The types and characteristics of greenhouse gases are as follows
| Greenhouse gas | Greenhouse effect ratio | Duration to remain in the atmosphere |
|---|---|---|
| Carbon dioxide | １ | １０００ years |
| Methane | ２５ | １０ years |
| Nitrous oxide | ２９８ | １００ years |
| Freon | １４３０ | １４ years |
Carbon dioxide remains in the atmosphere for 1000 years. Even if discharge is stopped right now, global warming doesn't stop.
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