Climate Change and Food Security

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Global warming induced heat waves, drought, and flooding  is a global food security emergency for us all today
​to protect our near and long term future food security​
The worlds top food producing  ​regions of the temperate Northern hemisphere ​are now climate change vulnerable
Millions face starvation
​ as world warms say scientists
Changes in climate are already affecting the sustainability of agricultural systems and disrupting production
​Unless the emissions of GHGs are curbed .. changes in temperature, precipitation, and other climate variables will undoubtedly affect agriculture around the world
Position statement of the American Society of Agronomy Crop Science Society of America Soil Science Society of America​.
Climate change: how a warming world is a threat to our food supplies
Global warming is exacerbating political instability as tensions brought on by food insecurity rise. With research suggesting the issue can only get worse we examine the risks around the world. The Observer 13 April 2013


A. Calzadilla Aug 2013 Higher food prices are expected no matter which climate scenario.
A 1ºC increase in temperature decreases Kansas ​wheat yields nearly 21%. A. Barkley Aug 2013
Food security weakening "on a scale we haven't seen"
​- expert 
Reuters June 2013
The 11,000 year period of relative climate stability in which agriculture developed is over. Lester Brown
IPCC AR5 2013 -2014 WG2 SPM
​Negative impacts of climate change on crop and terrestrial food production have been more common than positive impacts, which are evident in some high latitude regions.

Food production systems and food security. Without adaptation local temperature increases of 1.0C (global average also 1.0C) above pre-industrial​ are projected to negatively impact yields for major crops wheat rice and maize) in tropical and temperature regions.

Climate change will reduce crop yields sooner than we thought affecting all regions. Meta-analysis  Prof A. Challinor March 2014