UCLA Change of majors math to envi sci

I was recently admitted as a pre-math major and was looking to switch to environmental science but with a math minor instead.
I’ve completed:
2 courses of general bio logy (UCLA it’s Life Sci 1 and Life Sci 2)
1 course of general chemistry (UCLA it’s Chem 20B with Lab)
Math all the way up to differential equations (currently taking discrete mathematics, I’m unsure which math this correlates to for UCLA)

From looking at assist.org I would only have left intro to environmental science (possibly AP covers this? I received a 4 on the AP environmental science test), general physics E&M (received 4 on the AP Physics C Mechanics test), and Stats for environmental science (I believe this is taken at UCLA).

On the admissions contract it mentions that a change of majors is highly unlikely, but possibly my case is different as I am essentially almost prepared for the major (I plan to take summer courses). Is it possible for me to switch over, what steps should I take to do?

Any help greatly appreciated! Thank you!