If I remember correctly, this section started with Seasons and Weather and maybe Space? The first two are an easy choice of course. I wanted to separate the space books that are about planets from the space books that focused on rockets etc. but there's definitely some crossover. The section I've played around with the most is the "Earth" section. Originally, there wasn't a subheading for this section and I just put general environmental books here. At one point I had all the plants, gardening, and tree books here. I also had a lot of requests for and donations of books about fishing, camping, and hiking.
I ended up making an "Earth" section and putting all the habitat books there (the gardening and food plants went to Community/Farm). I also moved the general ocean books from animals to this section. The last section I added was the "Fun" section - the line between nonfiction and fiction is especially blurry here.
The most popular section here is Seasons, although each section goes out, well, seasonally. Except for snow books, weather and space circulate about equally.
