The food crisis is only just beginning. Via MeFi, which has more links that make me want to either reread Collapse or else go back to sleep.

But the surge in demand for agrofuels such as ethanol is hitting the poor and the environment the hardest. The UN World Food Programme, which feeds about 90m people mostly with US maize, reckons that 850m people around the world are already undernourished. There will soon be more because the price of food aid has increased 20% in just a year. Meanwhile, Indian food prices have risen 11% in a year, the price of the staple tortilla quadrupled in Mexico in February and crowds of 75,000 people came on to the streets in protest. South Africa has seen food-price rises of nearly 17%, and China was forced to halt all new planting of corn for ethanol after staple foods such as pork soared by 42% last year.

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A "perfect storm" of ecological and social factors appears to be gathering force, threatening vast numbers of people with food shortages and price rises. Even as the world's big farmers are pulling out of producing food for people and animals, the global population is rising by 87 million people a year; developing countries such as China and India are switching to meat-based diets that need more land; and climate change is starting to hit food producers hard. Recent reports in the journals Science and Nature suggest that one-third of ocean fisheries are in collapse, two-thirds will be in collapse by 2025, and all major ocean fisheries may be virtually gone by 2048. "Global grain supplies will drop to their lowest levels on record this year. Outside of wartime, they have not been this low in a century, perhaps longer," says the US Department of Agriculture.