… and so…; another important factor/reason …;

as a consequence; as a result; as; because;

because of; being that; consequently;

due to; for the reason that; for the same reason;

for; hence; for this reason; in consequence;

in that… ; in view of; owing to; since;

so; … so that…; the reason seems obvious;

there are about…; therefore;

thus; obviously; evidently