Scientists Predict 2 Global Warming Scenarios: Terrible And Even Worse

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NASA Climate Change Visualizations Show Possible Effect On Earth

NASA predicts that concentrations of carbon dioxide could double by 2100, raising the average temperature in the U.S. to 8 degrees Fahrenheit warmer. Another scenario, with lower emissions, would still warm the U.S. up to 4.5 degrees. To visualize these results, the scientists created a computer model to show how the two cases would look over a 30-year period. Either way, the results seem dramatic.