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Summary of Accelerating Decarbonization of the U.S. Energy System (2021)

Core Content

The report Accelerating Decarbonization of the U.S. Energy System (2021), published by the National Academies of Sciences, Engineering, and Medicine, provides a comprehensive analysis of the technological, policy, and societal dimensions required to accelerate the transition to a net-zero carbon energy system in the United States. It outlines a 30-year roadmap, with a focus on the first 10 years, to guide the nation toward a sustainable, equitable, and economically viable energy future.

The report emphasizes that the decarbonization of the U.S. energy system is not only essential for addressing climate change but also presents a significant opportunity for economic growth, job creation, and social equity. It acknowledges the role of emerging clean energy technologies and the importance of policy frameworks that support innovation, investment, and the fair distribution of benefits and costs.

Main Goals and Recommendations

Technological Goals

The report outlines five key technological goals for the U.S. energy system during the 2020s:

• Invest in energy efficiency and productivity: Improve energy use across all sectors to reduce waste and enhance performance.
• Electrify energy services in transportation, buildings, and industry: Shift from fossil fuel-based systems to electric alternatives, using low-cost and clean electricity as a foundation.
• Produce carbon-free electricity: Expand the use of renewable energy sources such as wind, solar, and hydropower, while also advancing nuclear, geothermal, and clean hydrogen technologies.
• Plan, permit, and build critical infrastructure: Develop and deploy the necessary infrastructure to support the transition, including grid modernization and storage solutions.
• Expand the innovation toolkit: Support research, development, and demonstration (RD&D) to bring new technologies to market and improve existing ones.

Socioeconomic Goals

The report also identifies four key socioeconomic goals:

• Strengthen the U.S. economy: Leverage the energy transition to boost economic competitiveness and create high-quality jobs.
• Promote equity and inclusion: Ensure that the benefits of decarbonization are shared fairly, particularly among historically marginalized communities.
• Support communities, businesses, and workers directly affected by the transition: Provide assistance and retraining programs to ensure a just transition.
• Maximize cost-effectiveness: Implement policies and technologies that deliver the greatest environmental and economic benefits at the lowest cost.

Key Policies for Accelerating Decarbonization

The report recommends several federal policies to support the transition:

• Establish a greenhouse gas budget: Define a clear pathway for reducing emissions across all sectors.
• Implement a price on carbon: Use market mechanisms to incentivize emissions reductions, while addressing competitiveness and equity concerns.
• Develop an equity and social justice framework: Ensure that the transition benefits all communities, especially those most affected by fossil fuel pollution.
• Create a new social contract: Mitigate harm to impacted communities and expand economic opportunities.
• Set rules and standards: Accelerate the development of clean energy markets, including clean energy standards for electricity, electrification and efficiency standards for vehicles, appliances, and buildings, and improved regulation of power markets.
• Establish labor standards for clean energy work: Protect workers and ensure fair labor practices.
• Implement corporate reporting standards: Enhance transparency and accountability in emissions and sustainability practices.
• Promote U.S. government procurement policies: Support domestic clean energy markets.
• Invest in a net-zero energy future: Include the creation of a Green Bank, new infrastructure, educational programs for a clean energy workforce, revitalized manufacturing, and research on technology innovation and social/economic impacts.
• Invest in efficiency improvements for low-income households: Through program redesign and expanded funding.
• Invest in the electrification of tribal lands: To ensure inclusive and equitable access to clean energy.

Implications and Context

• The transition to net-zero emissions is expected to reduce U.S. CO₂ and other GHG emissions by about 10% globally.
• It would significantly improve public health, particularly in low-income and minority communities, which are disproportionately affected by fossil fuel pollution.
• The U.S. has a unique opportunity to lead in global clean energy innovation and export.
• The report acknowledges that while some sectors (e.g., aviation, shipping, and industrial subsectors) are still in early stages, innovation and investment can bring them to commercial viability.
• Negative emissions technologies such as direct air capture and storage (DACs), bioenergy with carbon capture and sequestration (BECCS), and enhanced carbon uptake in soils and forests may be necessary to offset residual emissions.
• The report highlights the importance of public support and a fair distribution of costs and benefits to ensure the success of the transition over the next three decades.

Conclusion

This interim report serves as a technical blueprint and policy manual for the first 10 years of the U.S. energy system's transformation to net-zero emissions. It focuses on no-regrets actions that are robust under various technological pathways and hedging actions that maintain flexibility in the face of uncertainty. The recommendations are designed to support a just and equitable transition, enhance economic competitiveness, and improve public health and environmental outcomes. The final report will expand on these goals, including additional sectors and policy actors.

The National Academies of Sciences, Engineering, and Medicine emphasize the need for interdisciplinary collaboration, rigorous analysis, and public engagement to achieve these objectives. The report underscores that the transition to a net-zero energy system is not just an environmental imperative but also an economic and social opportunity that can be realized with the right policies and investments.