Cheap or Green?

Ok, so I have to send in field trip money to school. I grab an open bill pull out the return envelope and my husband says "Your not going to use that are you?" I replied "yes I always do that. " He says "that's ghetto "...Ok so is it? Am I cheap? Maybe, But also think why throw it away? it just
doesn't make sense to me to take a perfectly good envelope
and recycle it and buy envelopes that are prettier. They both serve
the same purpose, you put something in it someone rips it open and throws it
away. Then they look at what was inside. So I use them. It's way better for
the environment, and I am saving money, while I show some respect for
our great Mother Earth.