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There are over 8 billion people on earth. People drink, wash, and shit in multiple litres of water daily. Crops require water. Livestock requires water. We slaughter several edit:
Trillion (with a T) billion livestock globally each year, there is A LOT of livestock. Industry requires water. Industry is trusted not to hoard, pollute or waste water. Water processing and sewage reclamation requires well funded public infrastructure. The hotter our atmosphere is, the more water vapour it will hold.
Just some ideas to get you started.
I like boiling a bag of fresh soya beans and eating them plain while watching stuff.
Chana dal with aloo paratha (chickpea curry with potato filling stuffed in a fried bread) is probably my favourite beans based meal though.
Also as a brit, baked beans on hot (plant)buttery toast is very comforting on occasion.