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Concept
Economics of climate change mitigation
Summary
The economics of climate change mitigation is part of the economics of climate change related to climate change mitigation, that is actions that are designed to limit the amount of long-term climate change. Mitigation may be achieved through the reduction of greenhouse gas (GHG) emissions and the enhancement of sinks that absorb GHGs, for example forests.
The atmosphere is an international public good and GHG emissions are an international externality. A change in the quality of the atmosphere does not affect the welfare of all individuals and countries equally.
GHG emissions are unevenly distributed around the world, as are the potential impacts of climate change. Nations with higher than average emissions that face potentially small negative/positive climate change impacts have little incentive to reduce their emissions. Nations with relatively low levels of emissions that face potentially large negative climate change impacts have a large incentive to reduce emissions. Nations that avoid mitigation can benefit from free-riding on the actions of others, and may even enjoy gains in trade and/or investment. The unequal distribution of benefits from mitigation, and the potential advantages of free-riding, made it difficult to secure the Paris Agreement, which aims to reduce emissions.
Overlapping generations model
Mitigation of climate change can be considered a transfer of wealth from the present generation to future generations. The amount of mitigation determines the composition of resources (e.g., environmental or material) that future generations receive. Across generations, the costs and benefits of mitigation are not equally shared: future generations potentially benefit from mitigation, while the present generation bear the costs of mitigation but do not directly benefit (ignoring possible co-benefits, such as reduced air pollution). If the current generation also benefitted from mitigation, it might lead them to be more willing to bear the costs of mitigation.
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