Originally published on Tue December 3, 2013 7:56 am
Governments around the world have agreed to limit global warming to 2 degrees Celsius (3.6 degrees Fahrenheit). That would require an 80 percent reduction in energy sources like coal, oil and natural gas, which emit carbon dioxide into the air.
Nations are far from that ambitious path. There are big political and economic challenges. But technologists do see a way — at least for the United States — to achieve that goal.