>>2366484WATER, without it you'll die a desiccated corpse,
getting it from your surroundings may be the easiest thing/hardest thing depending on where you are
Desert(you are fucked, you WILL kill off the entire ecosystem in a region when you use up that small oasis you find/dig up)(you CAN, in some of them, collect large amounts of water from a plastic sheet and a shallow hole with smooth stones in the early morning, late evening) extracting it from plants will most likely cause you to trip balls and die with your pants somehow turned into a dancing partner,
middle of a prairie? you'll travel 50-500 miles for water if you can't find a decent stream/creak/river
forest? might luck out with tapping a tree, collecting rain water, secluded lake
BUT you'll most likely die from not having the most precious thing next to water and breathable air.......
SALT, yes, SALT.
Look up what happens to you without enough salt, after you sweat your balls off in the wild(a joke in most countries)
