Implementing policies to curb carbon emissions dramatically cuts health care costs associated with poor air quality — in some cases, by more than 10 times the cost of policy implementation, according to new research published in Nature Climate Change.

Policies aimed at reducing carbon emissions are as effective as laws targeting polluting compounds like ground-level ozone, also known as smog, and fine particulate matter, the MIT researchers say. An analysis of three climate policies — a clean-energy standard, a transportation policy, and a cap-and-trade program — found that savings from avoided health problems could recoup 26 percent of the cost of implementing a transportation policy, and up to to 10.5 times the cost of implementing a cap-and-trade program. A cap-and-trade program would cost roughly $14 billion to implement, whereas a transportation policy with rigid fuel-economy requirements could cost more than $1 trillion, according to the analysis.

Policies targeting specific sources of air pollution, such as power plants and vehicles emissions, did not lead to significantly larger benefits than cheaper policies, such as a cap-and-trade approach, the study found.


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