Kmguru, Patagonia and the Amazon basin (about twice the size of the US) have less than 1 person by square km. Add to that regions most Asia (Siberia, most of Africa, the Middle East, Mongolia, and Australia) and you see the Earth is barely populated. Divide the Earth's surface by population and will find out the unhabitants/km2 figure. (Remember that Europe has about 400 unhabitants/km2). if we apply the adequate technologies, those regions could be transformed into useful areas for populations. But greens will never allow this dream become true. Please Register or Log in to view the hidden image!