Hey, I’ve got a little trick up my sleeve. Take a bunch of pinecones and a handful of fresh moss, but instead of just lining them up, weave them into a living nest. Add a handful of kelp—its cells store a bit of heat from the sun when you press them together—and place the whole bundle in a tight, insulated pouch. The moss keeps the spark alive, the kelp releases a gentle heat burst, and the pinecones act like natural fire starters. When you crank the pouch over a stone or a metal bar, the whole bundle warms up enough to keep a pocket of air cozy. It’s not a stove, but it’s a living heat source that balances with the environment. Try it next time the cold creeps in and you’re out of gear.