What Causes Shifts in Population Growth?
Fotolia.com”> jQuery(document).ready(function(){ jQuery(‘#jsArticleStep1 span.image a:first’).attr(‘href’,’http://i.ehow.com/images/a06/f3/lu/causes-shifts-population-growth_-1.1-800X800.jpg’); }); A number of factors cause shifts in population growth. Billions of people live on Earth, and the population continues to grow. The population of the Earth was 1 billion in 1804; it surpassed 6 billion in 1999. At this rate of growth, some wonder if the Earth can continue to sustain a growing population. To determine where the population will go in the future, scientists look at factors that cause shifts in population growth. Fertility Fertility affects population growth by adding to the population. The number of babies born is also referred to as birthrate or natality. The rate of fertility depends on the location in the world, economics and human aspirations. More developed countries tend to have a lower birthrate, while less developed countries tend to have a higher birthrate. A University
