"Miracle" crops, hailed as the answer to global famine, are contributing to widespread brain impairment in the developing world, a new report concludes. It says that the high-yielding rice and wheat varieties that brought about the much-heralded "Green Revolution" are among a range of environmental factors undermining human intelligence.
The study concludes that a deadly combination of soil erosion, pollution and inadequate diet is affecting the intelligence of millions of people, with effects ranging from severe intellectual disabilities to "sub-clinical decline" in whole populations.
The report says that the new crops, unlike their predecessors, fail to take up minerals such as iron and zinc from the soil. So even as people consumed more calories, their intake of these key "micronutrients" fell.
"High-yielding Green Revolution crops were introduced in poorer countries to overcome famine," the report says. "But these are now blamed for causing intellectual deficits, because they do not take up essential micronutrients."
The report is written by Dr Christopher Williams, a research fellow with the Global Environmental Change Programme. Using already published UN data he has calculated that 1.5 billion people -- one quarter of the earth's population -- are affected by "Green Revolution iron deficiency". He claims the condition impairs the learning ability of more than half of India's schoolchildren.
The greatest drops in the intake of iron took place in South and South East Asia, the very areas where the Green Revolution was most successful.
Other UN figures show that half the world's pregnant women are anaemic, because they have too little iron, putting both them and their babies at risk. The condition is thought to be responsible for 200,000 deaths a year.
See News report in The Independent, London:
http://www.biotech-info.net/hi_tech_crops.html
Pollution 'damages intelligence' -- BBC News
http://news.bbc.co.uk/hi/english/sci/te ... 722907.stm
"The Environmental Threat to Human Intelligence", by Dr Christopher Williams
http://www.susx.ac.uk/Units/gec/pubs/br ... ief-13.htm
See also Seeds of the world and Nutrient starved soils lead to nutrient starved people.
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