CO₂ Module

The CO₂ module in Declaree helps you track and export CO₂ emissions linked to mileage expenses, accurately and automatically. Here’s how it works:

1. What the Module Does

• Real Emission Data: Declaree uses the RDW API to retrieve official emissions by entering a Dutch license plate.

• Emissions per Mileage: CO₂ emissions are calculated and shown for each expense.

• Export Data: Emission data can be exported via the Datadump module.

• Dutch Plates Only: Currently, the module supports only vehicles registered with Dutch license plates.

2. How It Works

Add a License Plate

When creating a mileage expense:

• A field appears for entering your vehicle’s license plate.

• Once saved, this number is also visible in your user profile under the Defaults tab.

• The plate is only visible to you. Other users, including managers, cannot view it.

View Emission Details

• After adding the expense to a report, an icon appears below the mileage entry showing the calculated CO₂ emissions for this mileage.

• If the license plate is missing or invalid, the CO₂ value will display as “NA”.

3. Export Emissions Data

To export CO₂ emissions:

1. Go to Configuration → Import & Export.

2. Click More → select Dump.

3. In the dialog, choose Emissions from the Type dropdown.

4. Additional Details

• License plate field visibility

  This field only appears for mileage rates with the transportation mode set to Driving.

• Emission sources
  The system uses WLTP values (Worldwide Harmonized Light Vehicle Test Procedure) via the RDW API. If WLTP is not available, the fallback is NEDC (New European Driving Cycle).

• Other transportation modes

  • Bike: 0 g/km

  • Walking: 0 g/km

  • Public transport: 20 g/km (based on http://CO₂emissiefactoren.nl)

By using the CO₂ module, you ensure accurate and reportable insights into the environmental impact of business travel—fully aligned with your sustainability goals.