Sponsored project on energy conservation using iot

Hello this is ROHITH CH from bangalore. I am also a student learning iot and ml from bolt iot. My college is organising a hackathon on energy conservation using iot. As i am a student of bolt iot ,my team is expecting me to deliver something good.So can you please help me with some ideas on energy conservation using iot. If i am selected college has promised to sponsor the project.

If you have any ideas contact chrohith10092001@gmail.com