# How can one carbon pool token, like CHAR, represent one tonne of carbon? When they're tokenized, carbon credits are represented as TCO2 tokens. When a TCO2 token is deposited in a carbon pool, it is locked, and a corresponding carbon pool token, like CHAR, is created. Every carbon pool token in circulation is backed by a TCO2 token. This can be verified by looking at a third party website like a block scanner and inspecting the contents of the pool, or by auditing the contents using a function like [`fetchPoolContents`](/developers/sdk/subgraph-interactions.md#fetchpoolcontents). --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.toucan.earth/resources/frequently-asked-questions/how-can-one-pool-token-represent-one-tonne-of-carbon-and-how-does-the-bridge-work.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.