Alternative food is food that uses "non-solar energy inputs" and that could therefore be produced even if a catastrophe such as a nuclear war, supervolcano eruption, or asteroid impact causes abrupt change in the climate (Baum, Denkenberger & Pearce 2016; see also nuclear winter).  Examples of alternative foods could include mushrooms grown on trees or edible bacteria fed natural gases (Baum, Denkenberger & Pearce 2016).

One organisation that focuses mostly on alternative foods is the nonprofit ALLFED.

Bibliography

Baum, Seth D., David C. Denkenberger & Joshua M. Pearce (2016) Alternative foods as a solution to global food supply catastrophes, Solutions, vol. 7, pp. 31–35....

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