> For the complete documentation index, see [llms.txt](https://greever.gitbook.io/eng/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://greever.gitbook.io/eng/greever/3.-game-fi-elements/b.-eco-mode.md).

# B. Eco mode

Normally, after registering an NFT, GREEVER will automatically be set on the Eco Mode.

Simply launch the app and select the NFT car of the collections.\ <br>

Then click the map menu at the bottom and press the START on the screen and now you can drive on Eco Mode.

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The ‘Mileage’ earning efficiency in eco mode depends on the user’s driving habits (eco-friendly driving) and the level of car.

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GREEVER utilizes dual token system ‘Leaves’ and ‘Governance Tokens (GVL)’.

Leaves have various usage for in-app activities; Vehicle Level-up, Appearance Change or can be spent in the marketplace as well. GREEVER will keep adding new usage for GVL as well.\ <br>

And finally GREEVER aims to lead numerous drivers worldwide to safer driving habits, to connect them to Web 3.0 and to fight against the climate change.

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