Adivse for UCL IEP

I'm currently studying EEE(Electrical and Electronics Engineering) in UCL, and gonna choose an IEP minor for further study now. I'm struggling between two choices, Application Programming for Data Science and Environmental Engineering.
Could someone who knows about those two minors help me with:
1. Is Environmental Engineering hard for study along with the EEE units in Year2&3, what would be taught during studying this unit, and whether this unit is relative with EEE or not.
2. Is Application Programming for Data Science hard in Year3, I've currently got no experiences in using Python, and a little bit weak in programming. And would the uni give less marks on exam or CWs on this unit?