Conjunctive adverb is an adverb or adverbial phrase that indicates a relation in meaning between two sequential independent clauses (or main clauses). It is also called a conjunct, a transitional conjunction, or a cohesive conjunction.
subordinate adverbial clauses function within sentences as adverbs. Just as most adjective clauses begin with a relative pronoun, adverb clauses always begin with a subordinating conjunction (after, before, unless, although, when, while, as soon as, as long as, as if, where etc) marking them as grammatically subordinate Hope this helps
The smoke coming out of the factory and the wastes coming out of the factory plus the boy pouring wastes into the water body. When all enter the water body it leads to pollution which can kill fish in the water.