Environment day sees UN call for ‘greener’ cities
By 2030, more than 60% of the world's population will live in cities, up from almost half now and just a third in 1950, UN Secretary-General Kofi Annan said. Growth poses huge problems ranging from clean water supplies to rubbish collection.
"Already, one of every three urban dwellers lives in a slum," Mr Annan said in a statement. "Let us create green cities," he said, adding the UN goal of halving poverty by 2015 would not be met unless city planning was less haphazard.