Studies of animals, for example, have shown that when a rat experiences stress during pregnancy, it can cause epigenetic changes in a fetus that lead to behavioral problems as the rodent grows up.

例如，对动物的研究表明，老鼠在怀孕期间经历压力会导致胎儿表观遗传发生变化，进而导致啮齿动物在成长过程中出现行为问题。

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This could cause rapid growth of water plants in the river, which can lead to the water ways getting clogged with organisms, which can change the flow of the water.

这可能会导致河里的水生植物快速生长，从而导致水道被生物体堵塞，从而改变水流。

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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