Food security is defined by the UN Food and Agriculture Organisation as ‘a condition in which all people, at all times, have physical and economic access to sufficient, safe and nutritious food to meet their dietary needs and food preferences for an active and healthy life’.

The impact of climate change on food security will be a consequence, not just of biophysical climatic changes, but of the social, economic, institutional, demographic and technological responses (or non-responses) to the challenge that climate change poses. Food security is undermined by lack of action or the wrong kind of action in these spheres.

Above text sourced from OpenLearn under a Creative Commons Attribution-NonCommercial-ShareAlike 2.0 Licence
http://labspace.open.ac.uk/mod/oucontent/view.php?id=426512&section=1.3.1