This presentation is created to bring awareness on the environment
http://starviewer.wordpress.com/2009/12/08/climategate-todos-los-cientificos-de-mayor-prestigio-contra-al-gore-mas-de-700-cientificos-internacionales-discrepan-de-la-teoria-y-advertencias-sobre-la-actividad-humana-como-causa-del-cambio-clima/Fuente…
An introduction to the 4 spheres that make up the interconnected global systems of the earth: the lithosphere, the atmosphere, the hydrosphere and the biosphere.