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I realize it sounds like an amateur question...but still... I'm interested in knowing what you all think.
what do you think about growing cactus as a source of water.....even if it has to be purified? I read somewhere that cactus can be a source of water, in emergencies? However, I am not a botanist and I honestly have no idea. How much of it would one need to grow to fill, say, a 1 liter bottle? Any ideas?