Hard-to-predict sudden environmental changes are more of a concern than climate change’s bigger but more gradual impacts, according to a report by the National Research Council.
The report calls for development of an early warning system to better anticipate sudden changes and emerging impacts.
Meanwhile, a study published in the journal PLOS One says the internationally agreed target to limit rises in global average temperatures to within 2 degrees Celsius is too high, and a more appropriate target is around 1 degree Celsius.
The lead author of the study is Jim Hansen, a former NASA climate scientist-turned-activist. Here is a PLOS interview with him.