Second Bachelor's Degree

Hey all!
My son, a soon to be graduate, is apparently interested in returning to school to obtain a bachelor’s degree in meteorology rather than go on to graduate school for history. I support him and he actually has the financial ability to this with little assistance from me but I was wondering if anyone has any advice or experience with this type of thing.

He has taken several ATMS classes and after talking to an advisor at the school, he feels confident he would be accepted no problem. The only thing he struggled to describe to me was how getting a second bachelor’s degree would work. Does he have to take all those general education classes again?

Anyone have any experience with second bachelor’s degrees?