The U.N. climate science panel report released on Monday lays out several paths for greenhouse gas emissions that could limit climate change or, alternatively, see it spiral out of control.
Grouping 1,600 potential pathways within eight broad categories, the Intergovernmental Panel on Climate Change describes how different government policies and industrial activities would influence the rise in global temperatures up to 2100.RegisterOnly two categories of pathways - dubbed "C1" and "C2" in the report - could keep the world to its 2015 Paris Agreement goal of limiting warming to within 1.5 degrees Celsius of preindustrial temperatures.
But that alone wouldn't be enough. Some carbon dioxide would also need to be removed from the atmosphere through increasing global forest cover as well as with nascent technologies such as direct air capture. These paths envision net-zero for CO2 by 2085, but some could fail to reach net-zero for all greenhouse gas emissions in this century.
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