Saturday, 22 April, 2000, 23:07 GMT 00:07 UK

''The human brain is now at risk from its own behaviour, and nothing else in the ecosystem is harming itself in the same way'' by Dr. Chris Williams

Pollution 'makes you stupid'

Brain at risk from the environment By environment correspondent Alex Kirby

Pollution and other environmental threats are harming the intelligence of millions of people across the world, says a United Kingdom review of the available evidence.

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http://news.bbc.co.uk/hi/english/sci/tech/newsid_722000/722907.stm