my apologies, i did not mean to come across as if i were expecting that.
ah, i am not interested in the oil and gas side of chemical engineering, if that is what you mean? this comment describes what i would be interested in! Reddit - Dive into anything (sorry, i don’t think i would be able to explain it very well myself 
)
i do find general process optimization interesting as well, and thats part of the motivation behind the switch. with biology, im only really interested in plant bio as it relates to food crops. i was worried about not having a backup plan if i did not make it through grad school, or land such a specfic job, if that makes sense. I was also second guessing if i would actually enjoy it as a career, or if i just liked the idea of it
i ended up finding chem e. by looking through alternative majors that still related somewhat to “sustainability,” where i would still enjoy the opportunities available for non phd holders, if things did not work out as planned.
basically, the reasons i was interested in plant biology and the reasons i am interested in chemical engineering now stem from the same set of interests. i realize thats very… unspecific but im not sure how to word this, sorry. essentially, i have had a long standing interest in enviornmental geography, but as i am not a humanities person, or a law and policy one, much of my major hunting has been to find a stem field that considers topics like that and i felt like chemical engineering, at least as the above commenter described, fit. if that makes sense?