The researcher said that before the body begins to freeze, cold can cause changes in brain chemistry which lead to hallucinations.

VOA: special.2010.02.24

Greenhouse gas emissions such as carbon dioxide are thought to be a major cause behind rising temperatures that have lead to extreme weather and food shortages.

VOA: standard.2009.09.28

The World Food Program says it is concerned the assaults last Sunday in Jonglei State could cause retaliatory attacks and this could lead to more deaths and to more people fleeing their homes.

VOA: standard.2009.08.08

Whether encouraging the abstemious to drink wine would cause them to lead healthier lives is moot.

ECONOMIST: Alcohol and health

They maintain the centre was never built to be a school, and if the scheme is approved it would lead to anti-social behaviour and cause house prices to fall.

BBC: Runcorn church 'school' plans considered

All of these factors and more could lead to price inflation and cause a global food crisis.

FORBES: Feeding Frenzy For Ag Stocks As Food Shortages Begin To Bite