The chairman of the UN food and agriculture oragnization’s climate change group, Wulf Killman said yesterday that an emerging pattern of drought has devastated crops across Africa, central America and south-east Asia.

“Africa is our greatest worry,” he said. “Many countries are already in difficulties … and we see a pattern emerging. Southern Africa is definitely becoming drier and everyone agrees that the climate there is changing. We would expect areas which are already prone to drought to become drier with climate change.”

34 countries are now experiencing droughts and food shortages. Up to 30 million people will need food assistance this year.

The worst affected countries include Ethiopia, Zimbabwe, Malawi, Eritrea and Zambia, a group of countries where at least 15 million people will go hungry without aid. The situation in Niger, Djibouti and Sudan is reported to be deteriorating rapidly.

Severe droughts have also badly affected crops in Cuba, Cambodia, Australia, Afghanistan, Vietnam, Morocco, Guatemala, Honduras and Nicaragua. According to the UN’s famine early warning system, 16 countries, including Peru, Ecuador and Lesotho, face “unfavourable prospects” with current crops.

In Europe, one of the worst droughts on record has hit Spain and Portugal and halved some crop yields. In Morocco the same regional drought has devastated farming and the government fears an influx of people into the cities.

Climate change, driven by greenhouse gases and global warming is changing weather patterns and contributing to the growth of deserts. World food production has been flat for the last four or five years; food stocks have been drawn down to make up for the shortfall. If climate change worstens then a major crisis is unavoidable.

And, again, the only answers that I can see are Green answers.