Multimedia artist David Bleja, a Polish/Australian multimedia artist living in Melbourne, Australia, has created an online simulation Breathing Earth. The site tracks birth and death rates around the world alongside the amount of carbon dioxide being emitted into the atmosphere.
Birth and death rates, along with population, are based on the July 2008 figures from the CIA World Factbook. Breathing Earth adds up the population figures of all countries. It continues adjusting the various population figures as you watch it, each time a person is born or a person dies.
CO2 emission rates come from the United Nations Statistic Division but is based on 2004 figures.