Originally Posted by Stazy
It's correct but its usage is awkward. It is usually recommended that "which" be employed only for non-restrictive clauses. Cars which make Al Gore wet is restrictive so "that" is more appropriate.
how about we use that plus which. As in, "Cars, that which make Al Gore wet". I've seen it in a few areas. And, what's with Al Gore being wet? Did he grow a vag since leaving office? Besides, your Canadian, what makes you all an expert on English?