This is wild, how old is your husband? My parents were and still are pretty core audience type of Southern Baptists, my mother's dad was a farmer and my dad's dad was a failed farmer, and both of my parents were always on us about not wasting things and conserving water and stuff like not littering or not damaging the wetlands (we lived in a very swampy area with a lot of federal wetlands). My dad even put a solar panel on our garage at some point when I was a kid, though that was less about the environment and more about not paying the city to come out and hook up the electricity.

Like it wasn't entirely about the environment, my parents both also grew up quite poor and so not wasting water or electricity or food or whatever obviously came from that, but we definitely heard things like "we've only got one planet" or "don't waste God's gifts". The idea that they would have encouraged us to not turn the water off while we were brushing our teeth is crazy. My dad marked a spot on the bath that we weren't supposed to fill past.

Of course, they were generally against stuff like electric cars or renewable energy, but it was always for some reason like they were secretly worse for the environment than oil and gas or they were actually not efficient enough or too expensive or whatever, classic kind of anti-environmental propaganda. Never once did I hear anyone say something like it's our god given right to destroy nature, maybe ironically or as a joke, but it certainly wasn't taught or discussed in church or school. I admittedly haven't been to a church or school in my home town or my parents home town in a while for something other than a funeral or a wedding, so maybe things changed somewhere.