Glossary
- AGC - active galactic centre
- AGW - anthropogenic global warming
- C12 - carbon isotope with atomic weight 12
- C13 - carbon isotope with atomic weight 13
- CAGW - catastrophic anthropogenic global warming
- CO2 - carbon dioxide
- dC13 - delta carbon thirteen, ratio between C13 and C12
- Gt/yr - metric gigatons per year
- kms - kilometres
- m - metres (occasionally minutes)
- MWP - Medieval Warm Period
- N-machine - One-piece (magnet and disc corotate) Faraday disc generator
- PETM - Paleocene-Eocene thermal maximum
- ppm - parts per million
- SO2 - sulphur dioxide
- ton - could be imperial ton or metric ton depending on context
- Tt - terra tonnes