Food security is built on three pillars:

• Food availability: sufficient quantities of food available on a consistent basis.
• Food access: having sufficient resources to obtain appropriate foods for a nutritious diet.
• Food use: appropriate use based on knowledge of basic nutrition and care, as well as adequate water and sanitation.

Food security is a complex sustainable development issue, linked to health through malnutrition, but also to sustainable economic development, environment, and trade. There is a great deal of debate around food security with some arguing that:

• There is enough food in the world to feed everyone adequately; the problem is distribution.
• Future food needs can - or cannot - be met by current levels of production.
• National food security is paramount - or no longer necessary because of global trade.
• Globalization may - or may not - lead to the persistence of food insecurity and poverty in rural communities.