WASHINGTON (AP) — The government for the first time is proposing broad new standards to make school snacks healthier, a move that would ban the sale of almost all candy, high-calorie sports drinks and greasy foods on campus.

Under new rules the Department of Agriculture proposed Friday, school vending machines that once were full of Skittles and Sprite would instead be selling water, lower-calorie sports drinks, diet sodas and baked chips. Lunch rooms that now sell fatty "a la carte" items like mozzarella sticks and nachos would have to transition to healthier pizzas, fruit cups and yogurt.

The rules, required under a child nutrition law passed by Congress in 2010, are an effort to combat childhood obesity. While many schools have already made improvements in their lunch menus and vending machine choices, others are still selling high-fat, high-calorie foods.