haha 4 downvotes for finding a comment humorous, I think the first paragraph of the article is quite powerful and a good contextual way of starting things off. Worth a read.
Ash is right, in Canada, you can't state that you're an "engineer" without being accredited by a provincial body, at least in Quebec it's pretty strict. However, it doesn't matter in the context of this article and it shouldn't detract from it either.
Really great stuff and nice hear about a career move that made you happier :)
"Chemistry answers that H2 and O2 can be joined to form water under certain conditions, but doesn't answer the whys".
Chemistry does answer the whys beyond product yields, why certain elements react is vastly covered throughout organic, inorganic & physical chemistry . It is the basis of these sub-fields, and how this is determined is looking at orbitals, energy states etc...