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

# CarboFoot League

App users reduce their carbon footprints while generating income as they perform activities. Users are ranked according to the amount of carbon footprint reduction. This ranking is called the Carbon Footprint League. There is no obligation to perform the application activities to take part in this league. Individuals and companies that want to reduce their carbon footprint can take place in this league by purchasing the carbon footprint certificate of other users.