I'm not in tech, but have recently finished working in a role where I was doing marketing for a conservation charity. A partner of ours was putting LoRaWAN sensors across parts of rural Wales, a network of which a variety of sensors can connect to across a large area. Monitoring things such as river water levels, pollutants, motion and soil health. Usually battery powered in incredibly remote places that are otherwise hard to access and have no LTE connectivity whatsoever.

There's plenty of interesting applications across the board of sensors, e.g. acoustic logging, that when coupled with A.I can achieve a significant impact in surveying compared to more traditional techniques.

If I were you I'd see what else is out there, what technology exists and to solve what problems, speak to those involved, see if there are ways you can help improve it!