> For the complete documentation index, see [llms.txt](https://wp2.enrex.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://wp2.enrex.io/2.-carbon-offsetting-options-and-market-data/2.1.-co2-allowances.md).

# 2.1. CO2 Allowances

Carbon allowance is a term used for a certificate or permit that represents the legal right to emit one tonne of carbon dioxide or equivalent greenhouse gas.

![Carbon Market](/files/4VQ0t9wzJwK0RYrZ3JZI)