CAM photosynthesis means they open their pores only at night to take in carbon dioxide, storing it for use in the day. This clever trick saves precious paani by avoiding the hot sun's thirst. But here in Rajasthan, even a clever plant cannot drink from an empty sky — without a reliable water source, no cultivation is truly possible. I know this because my neighbour tried aloe vera, another CAM plant, and watched it wither in the fourth year of drought when the well went bitter.
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