> For the complete documentation index, see [llms.txt](https://terraformingmars.gitbook.io/whitepaper/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://terraformingmars.gitbook.io/whitepaper/terraforming/population.md).

# Population

To terraform Mars, two resources are necessary: “Population" and Terraforming Point”

![](https://1464937818-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Ft5AZFXrxfINrSiWA29Pl%2Fuploads%2F5EAvCgkVEsZrImbfR6WA%2F_0001_point.png?alt=media\&token=6a6158cf-ca52-43ac-b594-6b7f8a4feba3)

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

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