Branson: Most of the air pollution in this country comes from our largest cities  These cities would pollute less if they were less populated
So if many people in these cities were to move to rural areas, air pollution in the country as a whole would be reduced
Similarly, we could conclude that Javier could consume fewer calories by eating for breakfast, lunch, and dinner only a portion of what he now eats, and eating the remainder as snacks. After all, breakfast, lunch, and dinner together account for most of the calories Javier consumes.