Full Title: Expanding the Reach of a Carbon Tax: Emissions Impacts of Pricing Combined with Additional Climate Actions
Author(s): John Larsen, Noah Kaufman, Peter Marsters, Whitney Herndon, Hannah Kolus, Ben King
Publisher(s): Columbia SIPA Center on Global Energy Policy
Publication Date: October 20, 2020
Full Text: Download Resource
Putting a price on carbon dioxide (CO2) emissions can help governments reduce them rapidly and in a cost-effective manner. While 10 carbon tax bills have been proposed in the 116th US Congress, carbon prices alone are not enough to reach net-zero emissions by midcentury. Additional policies are needed to complement an economy-wide carbon tax and further cut CO2 from the US energy system.
This study aims to provide a better understanding of such policy combinations. It projects the energy CO2 emissions impacts of two carbon taxes, starting in 2021, that span the rates in the carbon tax bills in Congress. The “low” tax scenario starts at $30 per ton in 2021 and rises at 5 percent plus inflation per year, reaching $44 by 2030, while the “high” carbon tax starts at $15 per ton and rises $15 per year, reaching $150 by 2030. The paper then describes the barriers inhibiting emissions reductions beyond those achieved by the carbon taxes alone for each major sector: electricity, transportation, buildings, and industry. Finally, it explores the energy system changes needed to overcome those barriers and the policy interventions that could deliver those changes. For certain key energy system changes, it provides quantitative estimates of emissions reductions incremental to the two carbon taxes.