If you want to consider Mercersburg (it’s in southern PA), they seem to have a lot of classes dealing with the environment. My kid is taking a class on (I think) Conservation during the Intensive semester (this is only bc of covid schedule). Besides learning about the science, from what I overhear he is designing some kind of condensation mesh for water supply in an arid climate. He is also scheduled to take Stream Ecology and AP Bio later on this year. They also have PGs (it’s the required afternoon activity, which ranges from sports to arts) that relate to the outdoors. They hike and kayak and things like that and the school supplies all the gear; I think it’s called MOE (Outdoor experiences?). They also have a ski team and I think bc the hill is so small the kids have to hike up the hill too. I’m not sure about this either (my kid didn’t do this sport).