Possibilities I use in my project:
- Interview —> Audio, but in the end it is only written.
- Visit: ARA in Rüti.
- Online research (Different websites, YouTube, etc.)
- Employer (I work part-time)
Other possibilites in could use in my project:
- Ask a person from another country how wastewater works there (I had a partner, but unfortunately he cancelled the appointment)
- Video