Chemical production: It's hard. You need to operate the machines with the same level of intelligence as a nuclear physicist. I have tried many times to conquer this one subject but it has proved un-defeatable. We can however appreciate this delicate form of science and the scientists who must endure this torture everyday. Not much else can be learnt from this other than science takes patience. And patience does not come easy. From tis experience, one can learn a lot about himself. I for one learnt that under pressure, I explode. Fin.