ATLANTA (AP):There's been a big shift in how many school districts take money from soda companies and ban junk food from vending machines, health officials say.
A government survey found 44 per cent of school districts banned junk food from vending machines last year, up from 30 per cent in 2006.
It also found drops in how many districts took a cut of soft-drink sales, received donations from soda companies, or allowed soda-company advertising.
Those are considered positive steps in helping the nation reduce the number of children who are overweight and obese.
But it's not clear how much impact the changes are having. The overall proportion of US children who are overweight or obese has been holding steady at around 17 per cent, according to government statistics.
Experts say that diet and exercise at home are at least as important as what kids are exposed to in school.