Search Climate Insights Directory

This policy brief provides guidance for utility modelers and regulators on integrating the US Department of Energy's (DOE) Energy Infrastructure Reinvestment (EIR) program into capacity expansion modeling. It outlines a three-step approach to maximize ratepayer savings: modeling portfolio-wide financing savings, prioritizing 'clean repowering' at existing fossil sites, and optimizing transmission investments. The document emphasizes the urgency of applying for EIR funding by the end of 2025 to meet the September 30, 2026, conditional commitment deadline.

This briefing by the Environmental and Energy Study Institute examines the prevalence, health impacts, and regulatory landscape of perfluoroalkyl and polyfluoroalkyl substances (PFAS) in the United States as of 2024. It details the contamination of drinking water and soil, the associated cancer and endocrine risks, and the multi-level government efforts—including the EPA's 2024 National Primary Drinking Water Regulation—to mitigate these 'forever chemicals'.

This guide by RMI outlines how Public Utility Commissions (PUCs) can use regulatory actions to ensure utilities leverage the Inflation Reduction Act (IRA) and the Infrastructure Investment and Jobs Act (IIJA) to reduce costs for ratepayers. It provides four case studies from Washington, Georgia, Oregon, and New Jersey, demonstrating proactive, mid-planning, procurement-stage, and program-design interventions to improve grid affordability and reliability.

This RMI report provides a roadmap for decarbonizing shipping fuels at Washington ports, aiming for catalyst deployment by 2030 and full decarbonization of ocean-going vessels by 2050 through the use of e-fuels and biofuels.

This research paper by the Center for International Environmental Law examines how climate-induced extreme weather is driving an insurance crisis in the United States, which in turn threatens housing affordability and financial stability. The authors argue that insurance companies are exacerbating the crisis by raising premiums to recoup losses while simultaneously reinvesting profits into fossil fuel companies.

This briefing by Zero Carbon Analytics examines the causal link between fossil fuel emissions and the increasing frequency and intensity of extreme weather events. It details the role of 'Carbon Majors' in global emissions, the financial disparity between industry profits and climate damages, and the growing use of litigation to hold these companies accountable. The document argues that a managed phase-out of fossil fuels, through both supply and demand reductions, is essential to limit global warming to 1.5 degrees Celsius.

This research note by Energy Innovation argues that the U.S. Treasury Department must maintain the "three pillars" (incremental, deliverable, and hourly-matched clean electricity) in the final rules for the Section 45V Clean Hydrogen Production Tax Credit. The author contends that weakening these rules would undermine climate goals, increase electricity costs for consumers, and stifle the development of a flexible, domestic electrolyzer industry.

RMI reports that expanding regional electricity transmission in the Western US is a 'win-win' economic opportunity. It finds that energy export states (Colorado, Montana, New Mexico, Wyoming) could increase their market access from $3 billion to $40 billion per year by 2050 with better transmission, while states with clean energy standards could reduce costs by over 30% through expansive regional planning.

This policy brief by RMI outlines how U.S. states can utilize Low-Carbon Fuel Standards (LCFS) to incentivize the adoption of clean hydrogen and hydrogen-derived fuels, particularly for hard-to-abate sectors like aviation, maritime shipping, and long-haul trucking. It analyzes existing programs in California, Oregon, and Washington to provide four key lessons for future state policies to ensure clean hydrogen is directed toward high-priority uses rather than sectors where electrification is more efficient.

This research paper by RMI analyzes energy burden—the proportion of household income spent on electricity and fuel—across all 50 US states using 2020 Energy Information Administration data. It finds that extremely low-income households face a disproportionately high energy burden, often exceeding the 10% threshold for energy poverty, and evaluates how federal funding from the Inflation Reduction Act (IRA) and specific state-level policies can mitigate these burdens while pursuing decarbonization.

This briefing by Zero Carbon Analytics argues for a rigorous, science-based definition of 'unabated fossil fuels' to prevent the use of weak policies and inadequate technologies from undermining the Paris Agreement goal of limiting warming to 1.5°C. It highlights that while the term has become central to G7, G20, and UN climate negotiations, the lack of a consensus definition allows for interpretations that may include low carbon capture rates or ignore upstream emissions.

This briefing from the World Resources Institute argues that carbon mineralization requires increased and customized federal policy support to reach its potential for large-scale carbon removal. While some funding exists through broad carbon removal initiatives, the document highlights a gap in dedicated support compared to technologies like direct air capture and outlines necessary advancements in research, deployment incentives, and safety regulations to scale the technology responsibly.

This guide explains California's Low Carbon Fuel Standard (LCFS), a market-based regulation designed to reduce greenhouse gas emissions and air pollution in the transportation sector by capping the carbon intensity of fuels.

This report by the World Resources Institute (WRI) analyzes the adoption of electric school buses (ESBs) in the United States as of June 2023. It tracks the number of committed vehicles, the impact of federal and state funding, and the distribution of these buses across different demographics and environmental conditions, highlighting a trend toward more equitable deployment in low-income and high-pollution areas.

This report by Energy Innovation analyzes the cost savings of operating electric vehicles (EVs) compared to gas-powered vehicles across the United States, focusing on 'fill-up' costs for sedans, SUVs, and trucks. Using a custom cost comparison tool, the authors find that EV drivers in every state save money per trip and annually, though the magnitude of these savings varies significantly based on state-level electricity rates and gasoline prices.

This guide by Zero Carbon Analytics explains the role of heat pumps in decarbonising buildings and industry, detailing their technical operation, economic viability, and the policy barriers to their global adoption.

This fact sheet explains the Advanced Clean Truck (ACT) regulation adopted by California in 2020, which requires original equipment manufacturers (OEMs) of medium- and heavy-duty vehicles to increase the percentage of zero-emissions vehicles (ZEVs) and near-zero-emissions vehicles (NZEVs) in their annual sales from 2024 to 2035.

This briefing by RMI examines the debate over emissions accounting methods in New York State, specifically focusing on the shift to a 20-year global warming potential (GWP20) timeframe and the inclusion of upstream and biogenic emissions. The author argues that this 'new climate math' increases climate benefits without necessarily increasing costs, as physical emissions remain constant regardless of the accounting timeframe used.

Carbon mineralization is a carbon dioxide removal (CDR) process that accelerates the reaction between CO2 and alkaline minerals (like those in basalt) to permanently store carbon as solid carbonates. While it offers potential co-benefits such as strengthened concrete and the neutralization of toxic mine tailings, scaling the technology poses risks including induced seismicity, high water usage in arid regions, and environmental impacts from increased mining. The document emphasizes the need for standardized measurement, reporting, and verification (MRV) protocols and updated mineral mapping to scale the process responsibly.

This guide explains the Advanced Clean Cars II (ACC II) regulation in California, which aims to reduce light-duty vehicle emissions by 50 percent by 2040. The regulation mandates that original equipment manufacturers (OEMs) increase the sale of zero-emission vehicles (ZEVs) and plug-in hybrid electric vehicles (PHEVs), culminating in a requirement that 100 percent of sales be ZEVs or PHEVs by 2035.