Pollution,drought and erratic weather patterns caused by climate change have already decimated much of Yemen's farmlands.

VOA: standard.2010.04.01

The period leading up to the domestication of cereals was one of erratic climate change, as the last ice age ended.

ECONOMIST: The earliest granaries

It won't be a dramatic sudden change but a long, slow, erratic climb out of the freeze.

BBC: Schools open for exams as freeze eases in parts of UK

Because of the erratic nature of hurricane movement, long-range forecasts often change.

CNN: Katrina hits Florida: 3 dead; 1 million in dark