From the Main means of transport drop-down, select the transportation mainly used during the mobility activity. The list proposes both sustainable (non- or less polluting), and non-sustainable modes of transport (e.g., plane).

When your selection is considered as sustainable, then the Sustainable means of transport (green travel) flag is automatically checked and the funded travel duration can be increased from a maximum of 2 to a maximum 6 days.

Sustainable means of transport (green travel) is defined as the travel that uses low-emissions means of transport for the main part of the travel, such as bike, bus, train, car-pooling, or other sustainable transportation.
_{Source: Erasmus+ Programme Guide, Glossary}

The flag is also automatically checked when you select Other sustainable transportation from the list. Plus, starting from call year 2024, the additional field Please describe the mode of transport used becomes available and must be filled in (maximum 300 characters).