What should be the basis of policy positions on the level and time path for GHG reductions globally?
Adopt a scientific-based goal, e.g., "stabilization of greenhouse gas concentrations...to prevent dangerous ... interference with the climate system”
Follow some version of the precautionary principle, which usually involves the idea that we should exercise caution in advance of harm because we don’t know how extensive the damage might be in the future, and it may be irreversible
Apply a form of economic analysis—benefit cost analysis or a similar decision tool—to determine the time path of emission reductions
Wait to take action until we understand more about what will happen with the climate system and how large the negative impacts will be
Use a decision making method designed for deep uncertainty, such as focusing on choosing among robust decisions
Focus on goals based on historical emissions, such as 1990 levels
Other:
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