Population density depends on the climate conditions and topography of the place, like few people live in high latitude areas, tropical deserts, mountainous terrains, and forest areas, whereas a large number of people reside in plains. Fertility of soils, availability of fresh water, minerals are other major geographical factors behind this. Some social factors that boost the density of population in a region are better housing, education and health facilities. Places with cultural or historical significance are usually populated. Employment opportunities are another attraction for large chunks of population.