Feeding Everyone: Solving the Food Crisis in the Event of Global Catastrophes that Kill Crops or Obscure the Sun
- D. C. Denkenberger, J. M. Pearce
Summary
Researchers rate the likelihood and severity of nine catastrophe scenarios in which global agricultural production is severely interrupted, and propose a collection of resilient foods that can be produced in cases where we have little access to sunlight. In the absence of massive infrastructure destruction and breakdowns of cooperation and trade, they estimate that humanity could be fed over a period of five years using e.g. mushrooms, methane-fed bacteria, leaves and animals feeding on decomposed wood.
Abstract
Mass human starvation is currently likely if global agricultural production is dramatically reduced for several years following a global catastrophe: e.g. super volcanic eruption, asteroid or comet impact, nuclear winter, abrupt climate change, super weed, extirpating crop pathogen, super bacterium, or super crop pest. This study summarizes the severity and probabilities of such scenarios, and provides an order of magnitude technical analysis comparing caloric requirements of all humans for five years with conversion of existing vegetation and fossil fuels to edible food. Here we present mechanisms for global-scale conversion including: natural gas-digesting bacteria, extracting food from leaves, and conversion of fiber by enzymes, mushroom or bacteria growth, or a two-step process involving partial decomposition of fiber by fungi and/or bacteria and feeding them to animals such as beetles, ruminants (cattle, sheep, etc), rats and chickens. We perform an analysis to determine the ramp rates for each option and the results show that careful planning and global cooperation could maintain humanity and the bulk of biodiversity.