Draft:Food preservation

Why it's essential to feeding the world sustainably

• Prevents food waste - explain how: it smooths out temporal mismatches of supply and demand.
• Provides food security by having something available always
• Consider how crop harvest productivity varies from year to year. Food preservation harnesses the long-term trend.

How it can be done

• Dehydration
  • requires some energy input and/or land.^{[QUANTIFICATION needed]}
• Freezing
  • probably higher energy requirements^{[QUANTIFICATION needed]} - depends how long it stays frozen for on average.^{[RESEARCH needed]}
• Canning
  • more packaging per unit food - might have a unreasonably higher resource footprint.^{[RESEARCH needed]}
• Pickling
  • not suited for the bulk of the diet (too much sodium).