Combatting the increasing prevelance of scurvy, ricketts or diabetes 2 which none of you have mentioned could be done, for the next generation at least, by teaching school children to cook!
I believe in most countries of the western world, only those of us who are over retirement age were actually taught to cook and even amongst my comtempories, a lot of people never make a meal from scratch.
Some buy ready prepared frozen meals, many buy pre-frozen vegetables, which quite frankly, taste nothing like fresh ones and have a lower nutrional value.
Teaching children to cook and to do so healthily could mean that the next generation drops fast food, tinned foods, pre-frozen food and entire pre-frozen meals, most of which contain far too much salt, sugar and other additives and are generally speaking not so good for you.
Yes, eating fruit is healthy, but with the prices fresh fruit is sold for, no-one can afford to eat it every day, a fact that those who advise on a healthy diet consistently ignore.