E3 supported the Hawaiʻi State Energy Office in the development of a report to the State Legislature evaluating long-term pathways to economywide decarbonization in Hawaiʻi and recommending new policies to ensure the achievement of the state’s decarbonization goals. E3 supported the Hawaiʻi State Energy Office in this effort by developing long-term decarbonization scenarios using the PATHWAYS model to explore the tradeoffs between different pathways to achieving Hawaiʻi’s goals.

The report affirms and recommends maintaining the state’s economy-wide emissions reduction target of 50% by 2030, relative to 2005 levels. The analysis shows that while challenging to achieve, with high levels of energy efficiency and conservation, renewable energy, and natural carbon sinks, among other measures, this ambitious goal is within reach.

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E3 provided scenario analysis to support the US Climate Alliance’s 2023 Annual Report which highlighted the progress Alliance members have already made toward reducing greenhouse gas (GHG) emissions, and using E3’s modeling, detailed multiple scenarios of Alliance-wide GHG emissions through 2050. E3 evaluated Alliance-wide GHG emissions through 2050 using E3’s PATHWAYS model to map out the trajectory of current policies including the Inflation Reduction Act, proposed federal actions, and additional ambitious collective actions for Alliance states or the federal government. These scenarios highlighted the gap between current policies and GHG targets and quantified the impact of incremental measures and actions. E3 also evaluated the benefits and costs of achieving net zero GHG emissions, including health benefits, climate benefits, and direct costs of fuels and clean infrastructure, showcasing net savings through 2050 of decarbonization.

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E3 worked with the World Resources Institute (WRI) to develop four scenarios of increasing ambition to reduce greenhouse gas (GHG) emissions across all sectors of the United States economy using E3’s US PATHWAYS and RESOLVE models. E3 collaborated with WRI to develop robust scenario definitions, collect publicly available data and assumptions, and create interactive spreadsheet results. The goal of the study was to understand the effect of high-impact federal policies on achieving 50% emissions reduction by 2030 and net-zero emissions by 2050. The analysis demonstrates the importance of key near-term building blocks, including: 1) aligning economics for customers and companies to adopt clean energy technologies; 2) aligning policy and institutions to remove barriers to technology deployment; 3) increasing consumer awareness and education to unlock higher levels of adoption; and 4) creating a transition plan for fossil fuel jobs to ensure a smooth transition.

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E3 provided modeling and scenario analysis to support the US Climate Alliance’s 2021 Annual Report. The report highlights the progress Alliance members have already made toward reducing greenhouse gas (GHG) emissions, and using E3’s modeling, details multiple scenarios of Alliance-wide GHG emissions through 2050. E3 evaluated Alliance-wide GHG emissions through 2050 using E3’s PATHWAYS and RESOLVE models. The GHG emissions scenarios E3 developed for the Alliance highlighted the gap between the GHG reductions that would be possible with proposed state and federal policies and the reductions necessary to meet established federal targets. E3 also modeled the emissions impacts of the collective actions that would help bridge that gap.

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E3 is supporting NYSERDA in its analysis to inform the Climate Action Council’s Scoping Plan. E3 has developed scenarios showing how New York could achieve carbon neutrality as outlined in the Climate Leadership and Community Protection Act (CLCPA). This work includes a detailed analysis of buildings, transportation, industry, electricity generation, non-combustion, low-carbon fuels, and negative emissions using E3’s suite of modeling tools (PATHWAYS, RESOLVE, and RECAP) and parallel modeling efforts at NYSERDA. E3 also assessed the economy-wide cost of decarbonization and compared it to the societal benefits of reduced greenhouse gas emissions and monetized benefits of improved air quality through reduced combustion. E3’s work includes detailed modeling of the CLCPA electric sector targets, including the 70×30 and 100×40 goals as well as technology-specific targets such as the 9 GW offshore wind target.