You already know that salt intake is highly correlated with high blood pressure and heart disease. And you probably have a vague sense that processed foods contain a lot of salt. But the specifics are truly terrifying, as this graphic by Next Generation Food shows.
It's not exactly the most legible graph--I mean, triangles aren't exactly a case study in information clarity. But the point comes through. Check out, for example, that fact that a single Burger King Whopper with cheese has 75% of your recommended daily salt intake; and the fact that Americans eat 250% of their recommended daily allotment: