Earth's Climate in the Balance New Permanent Exhibit Digital Resource March 2 The Earth has experienced 4.6 Billion years of climate change. But what is climate? How has it changed in the past? What are the scientific facts behind global warming? Are we in the midst of the sixth greatest extinction in the history of life? Discover the answers to these questions and more in this newly digitized and enhanced exhibit resource which examines the big picture on climate change with an informative and approachable treatment of some of our most pressing and current concerns. Proudly presented by Ontario Power Generation