What we normally hear about population density relates to the number of persons per square kilometre of a given country or region. That information can give us an idea of certain everyday problems people may have. After reflecting on this I thought that a way of discovering future problems could be related to the population density regarding arable land, in this way could be better understood the potentiality or possible alimentary dependence of each country. Some dramatic cases are exposed in this graphics. Where can be compared both types of population densities. Access to raw data is available upon request.