| 22-12-2015 23:48 | |
| Tai Hai Chen★★★★☆ (1085) |
jdm wrote: At the peak of the Pliocene some 4 million years ago, CO2 reached 415 ppm because of very high temperature. Next year CO2 level 404 ppm. https://scripps.ucsd.edu/programs/keelingcurve/2013/12/03/what-does-400-ppm-look-like/ |
| Threads | Replies | Last post |
| The SCIENCE of the "Greenhouse Effect" | 418 | 11-07-2026 21:25 |
| Just How Many "Greenhouse Effects" Are There? | 185 | 10-06-2026 00:42 |
| Climate change is caused by greenhouse gases | 230 | 07-05-2026 21:39 |
| Nitrate Reduction - Powerful Greenhouse Gas Emission AND Alkalinity | 112 | 07-04-2025 19:09 |
| Greenhouse gasses | 83 | 18-07-2024 21:32 |