Americans are eating more whole fruits, nuts and seeds, and drink fewer sugary drinks, than they were in 1999.

But the gap between the diets of rich and poor seems to be widening. Low-income urban areas that are at least a mile from the nearest supermarket, and rural areas that are at least ten miles from any grocery store, are considered “food deserts”. In 2009 4.1% of America’s population lived in such deserts.

If fresh food becomes more available, though, it will not necessarily get eaten.