How extreme weather could create a global food crisis

There is a systematic influence on all of these weather events nowadays because there is more water vapour lurking around in the atmosphere than there used to be, say, 30 years ago. It's about a 4% extra amount, provides plenty of moisture for these storms and it's unfortunate that the public is not associating this with the fact that this is one manifestation of climate change. And the prospects are that these kinds of things will only get worse in the future.

link to article:http://www.guardian.co.uk/environment/blog/2011/feb/04/extreme-weather-global-food-crisis