# Population ![](/files/Q1uo7G38sXbMMmn5hseu) Population is the number of people who can live in the territory * Land can be upgraded with terraforming points * When a Land is upgraded, the population of the Land increases * Citizen NFT can be issued in proportion to the number of people * Additional resources can be acquired with Citizen NFT, and a certain percentage of the collected resources is paid as tax to Land NFT ​ --- # 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://terraformingmars.gitbook.io/whitepaper/terraforming/population.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.