USA Today: The world's first satellite dedicated solely to tracking atmospheric levels of carbon dioxide is being developed at a Gilbert, Ariz., manufacturing facility, as NASA scientists move to make space the next frontier in the study of global climate change. The satellite, estimated to cost about $468 million, promises to paint a more detailed picture of the environmental impact of global warming, including how forests and oceans are reacting to higher levels of CO2, scientists say. "It's obvious that...