The world is in the grip of a fat pandemic that threatens to overwhelm every country's health system with diseases such as diabetes and heart disease and shorten the life span of future generations, experts at an international conference warned on Sunday.
"Obesity is an international scourge," Prof. Paul Zimmet, the chairman of the meeting of more than 2,500 experts and health officials, told delegates in a speech opening the International Congress on Obesity. "This insidious, creeping pandemic of obesity is now engulfing the entire world."
"It's as big a threat as global warming and bird flu," said Zimmet, an Australian expert on diabetes.
Other experts at the conference said the cost of treating health problems related to being overweight was immeasurable on a global scale, but was estimated at billions of dollars a year in countries such as Australia, Britain and the United States.
"We are not dealing with a scientific or medical problem, we're dealing with an enormous economic problem that, it is already accepted, is going to overwhelm every medical system in the world," said Prof. Philip James, the chairman of a global task force set up by medical organizations that deal with weight-related problems.
He said governments had been forced to confront rising obesity rates because of the expense of treating related health issues.
Among the most worrying problems is skyrocketing rates of obesity among children, which made them much more prone to chronic diseases as they grow older and could shave years of their lives, experts said.
The children in this generation may be the first in history to die before their parents because of health problems related to weight, Prof. Kate Steinbeck, an expert in children's health at Sydney's Royal Prince Alfred Hospital, said in a statement.
The World Health Organization says more than 1 billion adults around the world are overweight and 300 million of them are obese, putting them at much higher risk of diseases such as diabetes, heart problems, high blood pressure, stroke and some forms of cancer.
There are now more overweight people in the world than people who are undernourished, who number about 600 million, Zimmet said.
People in wealthy countries were leading the world in overeating and not doing enough physical activity, but those in developing countries in Asia, Africa and Latin America were fast learning the bad habits, delegates said.
But the traditional way of dealing with the issue — focusing on getting individuals to adjust their diet and exercise — had failed, and a more multifaceted response involving governments, business and community groups is needed, they said.
Experts also said governments should impose bans on junk food advertising aimed directly at children, although they acknowledged such restrictions were unlikely to come about soon because the food industry would lobby hard against them.
"There is going to be a political bun fight over this for some time, but of course we shouldn't advertise junk food to children that makes them fat," said Prof. Boyd Swinburn, a member of an international task force on combatting obesity.
Leaders of the International Association for the Study of Obesity, an umbrella group for medical organizations dealing with weight-related and children's health issues, on Sunday approved backing such advertising bans as official policy, its president, Prof. Claude Bouchard, announced.
One in four children in Australia is overweight or obese, said Steinbeck. Half of Australia's adult women are overweight, and two thirds of men, she said. The rates were among the highest in the world, with the United States worse, she said, without giving figures for the U.S.
Modern life has created an environment that is counterproductive to staying a healthy weight, experts said, including neighborhoods that were increasingly being built with not enough public space for residents to exercise, said Prof. Louise Baur, a child health expert at the University of Sydney.
The conference will hear research and papers from almost 400 experts before wrapping up on Friday.
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