This is an answer to "har ooi" who send me a email
All minors which usually offered my chemical engineering departments in universities have their own uniqueness and importance. Depending your interests and ambitions you may select a minor stream in your chemical engineering degree.
If biology and chemistry is your favorites select biochemical engineering, if you are fascinating about organic chemistry you may select polymer engineering. If you wish to make your contribution on climate change, global warming, deforestation, waste minimization .... etc environmental engineering is there. If you wish to be a part in industrial chemical plants use general chemical engineering path for your future.
Select minor field depending on your skills and interests. you may find your academic and carrier life very interesting!