today, obesity has reached epidemic proportions. In aldults, it is now more common globally than under-nutrition. Unless effective action is taken to reverse the trend, obesity and its consequences are set to impose ( PRECEDENT) financial, social and health burdens on society. Obesity is caused by an energy ( BALANCE ) ; when an idividual's intake of calories exceeds their ( EXPEND) of calories, the surplus energy is stored as body weight. But what is the main ( DIRVE) of the current obesity epeidemic? Unfortunately, here, consensus among experts is absent. The relative importance of genetic, enviromental, ( BEHAVE) and social factors is still hotly debated. While experts disagree as to the reasons why we now ( EAT ) to the extent we do, they do agree that the shift from traditional diets featuring grains and vegetables to diets rich in fat and sugar is fuelling the epidemic. Today, it's cheaper to buy fast food than it is nutrious food; it's easier to find it ; and it's ( EXCEED) easy to get addicted to it ( in part because it is heavily marketed, in part because it has been specifically engineered by food chemists to tastes ( RESIST) . Unfortunately, the food industry can not be expected either to alter their products or market them in such a way as to reduce their appeal to consumers, as they have a duty to their shareholders to maximise profits. Thus, food manufacturers cannot be called upon to play an ( CONSTRUCT ) role in the obesity epidemic. It is for this reason that many experts favour government intervention in the fight against obesity. Specifically, the ( INTRODUCE) of legislation that would suspend all junk food advertising to children.
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