Documents Global Warming1

1.Global Warming Thursday, April 8, 2010 2. History of Our PlanetEarth formed 4.6 Billion years ago.Life appeared 3.8 Billion years ago.Photosynthesis occurred 3.5-2.5 Billion…

Documents Global Warming

1.Global Warming Thursday, April 8, 2010 2. History of Our PlanetEarth formed 4.6 Billion years ago.Life appeared occurred Billion years ago.Photosynthesis occurred 3.5-2.5…