Complete the following passage by filling in each blank with one word that best fits the context.
On November 2nd San Francisco became the first major US city to pass a law on controlling give-away toys with unhealthy restaurant meals marketed at kids.
______law will take effect on December 1， 2011. It is required that kids’ meals
 
      meet certain nutritional standards       they can be sold with free toys.
McDonald’s officials were angry with the decision，      effectively bans their popular Happy Meals.
But supporters say      aims to promote healthy habits while combating child obesity(肥胖). “This is a challenge to the restaurant industry to think about children’s health first，” said San Francisco Supervisor Eric Mar.
About 15 percent of American            are overweight or obese， which puts them       risk of developing heart disease， cancer， etc. In some states， the childhood obesity rate is over 30 percent.
McDonald’s started to sell the Happy Meals in 1979 with toys. In 2006， fast-food companies spent more than $520 million on advertising and toys to promote meals  children， according to the US government.