> ## Documentation Index
> Fetch the complete documentation index at: https://docs.luxima.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Environmental impact

> Enter impact figures yourself or let LUXIMA estimate them.

The **Environmental impact** section holds four figures per unit:

| Figure | Unit |
| - | - |
| **Carbon footprint** | kg CO₂e |
| **Water use** | litres (water-equivalent) |
| **Energy use** | kWh |
| **Land use** | points (Pt) |

![The Environmental impact section with the AI gap-filling banner and Auto-fill with AI button, and four fields for carbon footprint, water use, energy use and land use, each with a Calculated badge](https://mintcdn.com/mbp-network-technology-limited/1xt4kkw3dvIU7n1q/images/products/environmental-impact.png?fit=max\&auto=format\&n=1xt4kkw3dvIU7n1q\&q=85\&s=b3f4a260bf6e6c03c45f09b00d2d3af9)

Impact figures calculated from the product's materials and weight

## Where a figure comes from

Each figure has a badge that says how it was produced:

* **AI estimate:** estimated by LUXIMA. Check it before you rely on it.
* **Calculated:** calculated from the product's materials and weight.
* **Declared:** a value you typed in.

An empty field is marked **Manual** until it has a value. Typing a value yourself marks it as declared.

## Enter figures yourself

Type a value into any of the four fields and click **Save changes**. On the Free plan this is how you add impact data.

## Estimate with AI

On Starter and above, LUXIMA can estimate missing figures for you.

**1. Fill in what the estimate needs**

The estimate uses the product's category, total weight and materials. In [Materials](https://docs.luxima.io/products/materials.md), add at least one material, make the shares add up to 100% and enter the total weight.

**2. Run it**

Click **Auto-fill with AI**. If the product already has figures, LUXIMA asks you to confirm before replacing them.

**3. Save**

The new figures are in your draft. Click **Save changes** to keep them.

On the Free plan you see **Upgrade to auto-fill** instead.

> [!WARNING]
>
> On plans with auto-fill, saving a product recalculates its impact when the category, weight or materials have changed, or when the carbon or water figure is empty. This can replace figures you typed in. If the calculation fails, the product is not saved until you fix the cause.

## Messages you might see

| Message | What to do |
| - | - |
| "Add at least one material before calculating environmental impact." | Add the product's materials. |
| "Enter the finished product weight before calculating environmental impact." | Fill in **Total weight (g)** in Materials. |
| "Material composition must add up to 100% before calculating environmental impact." | Correct the shares. |
| "Choose a recognised material for ... before calculating environmental impact." | Pick the material from the suggestions instead of free text. |
| "Environmental impact could not be calculated for this material and product category." | Check the material, or enter the figures yourself. |

## Recalculate many products

On the Passports page, select the products and click **Recalculate / auto-fill**.


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