I think part of the solution is having gardens at every public school. They provide exercise,  educational opportunities, skill building, and fresh healthy food. The students are more likely to eat healthy food if they have some ownership in producing the food. The students can learn about nutrition and food preparation.  For a relatively small investment green houses would make the gardening a year round activity. The students could participate in their construction. One thing rural ares have in abundance is space for gardens. Communities can do this without help from D.C.