When I was talking to my dad the other day, he told me how he and my grandparents checked out a mansion near our house. According to the tour guide, one of the owners of the house would pick peaches for the war. Apparently, 25 peach pits would be ground up into a powder like substance and mixed in with other stuff to use for gas masks to filter the gas sort of like a charcoal filter.
I found an article about it here.
To think that peach picking, something I do with my mom for fun and to get lots of the tasty fruit, was used in WW1 to save lives.