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Analysis of 244 U.S. weather stations shows that 86% of locations have seen an increase in extremely warm winter days since 1970, with the coldest day of the year warming by an average of 7°F across 242 locations.

The report warns that 'relining' seven aging coal-based blast furnaces in the US Great Lakes region is a multi-billion dollar risk that locks in high emissions and health-harming pollution for another 20 years. While these plants represent only about a quarter of US steel production, they generate approximately 75 percent of the industry's emissions. The authors argue that instead of spending $150M to $425M per furnace on relines, companies should invest in hydrogen-ready Direct Reduction (DRI) coupled with electric arc furnaces (H2-DRI-EAF), which can achieve near-zero carbon emissions. Although a new DRI plant costs more ($600M to $800M) and faces a near-term energy cost gap of approximately $2.50/kg H2 compared to coal, the transition is projected to protect skilled union jobs and create additional employment in renewable energy and hydrogen production. The report concludes that federal and state support—via tax credits, grants, and infrastructure investment—is necessary to close the remaining economic gap and avoid stranded assets.

Climate Central analyzed 2,041 U.S. monitoring stations from 1970 to 2023, finding that 64% of locations experienced a decrease in annual snowfall. The report highlights regional disparities, noting that while the western U.S. faces shrinking snowpack and increased snow drought, the Great Lakes region sees a trend toward more lake effect snow due to reduced ice cover, though the overall snow season is projected to shorten. These shifts threaten water security in the West, the winter recreation industry in the Northeast, and aquatic ecosystems in the Northern Great Plains.

The Great Lakes region—comprising Illinois, Indiana, Michigan, Minnesota, Ohio, Pennsylvania, and Wisconsin—is positioned to drive US aviation fuel targets due to its strong industrial networks and feedstock availability. While the region possesses significant strengths in ethanol supply chains and logistics, a policy gap analysis reveals that no state currently has a comprehensive, coordinated approach to SAF demand and supply. The brief argues that leveraging existing infrastructure, such as the O'Hare International Airport hub and the St. Lawrence Seaway, alongside federal incentives from the Inflation Reduction Act, can catalyze a regional bioeconomy and reduce aviation emissions.

The Great Lakes region is well-positioned for the EV transition due to its automotive history and R&D capacity, but faces competition from the 'Battery Belt' in the Deep South. While the region has significant midstream and downstream capacity, it lacks comprehensive state-level industrial strategies, particularly regarding battery end-of-life mandates and recycling incentives. The document argues that states must coordinate on strategic roadmaps, workforce retraining, and clean energy infrastructure to avoid economic disruption in 'powertrain communities' specialized in internal combustion engine (ICE) components.

The document reports that winter is the fastest warming season for most of the U.S., leading to a general decrease in fall and spring snowfall between 1970 and 2019. It details regional impacts, such as a 15-30% reduction in snow-derived freshwater in the Western U.S. since 1955, a shift toward rain over snow in the Northeast, and a shortened lake effect snow season in the Great Lakes region. These changes threaten water security for agriculture and municipalities, increase wildfire and drought risks, and negatively impact the winter recreation industry.

The document argues that substituting portland cement with SCMs—such as fly ash, ground glass, natural pozzolans, and blast furnace slag—is a cost-effective way to reduce the embodied carbon of concrete. It highlights that up to 40% substitution is possible in the US, potentially saving 27 Mt CO2e per year and reducing emissions for specific applications by up to 80%. However, it notes that supply for some SCMs is geographically constrained or declining due to the phase-out of coal power, suggesting the reclamation of stored fly ash and the use of natural pozzolans as viable future alternatives.

The document details efforts to enhance coastal resilience in the Great Lakes region through nature-based solutions, such as wetland restoration and climate-smart agriculture. It highlights the role of the Coastal Assembly in coordinating bi-national wetland restoration and the Great Lakes Indian Fish & Wildlife Commission's (GLIFWC) use of traditional ecological knowledge (TEK) to assess species vulnerability. The briefing also emphasizes the importance of soil health in carbon sequestration and the need for federal policy modernization, including updates to the Stafford Act and expanded funding for the Great Lakes Restoration Initiative.

The document outlines the use of HadCM3 and Parallel Climate Model (PCM) data, combined with IPCC 2000 emission scenarios and a century of historical records, to project climate changes in the Great Lakes region. The analysis indicates greater temperature increases, especially in summer, and general drying during summer and fall compared to previous assessments.

The document describes how climate change and human pressures will affect the Great Lakes Region, specifically highlighting risks to human health, the regional economy, and the cultural sense of place.

The report identifies a warming and potentially drier trend for the Great Lakes region, predicting significant temperature increases and shifts in precipitation patterns by the end of the 21st century. These changes are expected to disrupt aquatic ecosystems, reduce forest diversity, and create economic risks for agriculture and shipping. The document advocates for a three-pronged approach: reducing greenhouse gas emissions, minimizing local environmental pressures, and planning for climate adaptation.

The report assesses how rising temperatures and shifting precipitation patterns will affect the Great Lakes region, predicting warmer, drier summers and increased extreme weather. It details vulnerabilities in aquatic and terrestrial ecosystems, agriculture, and human health, while recommending emission reductions and adaptive management.

The report explores automated emissions reduction (AER), a software-based technology that modulates the electricity use of internet-connected devices based on real-time grid emissions data. Based on a pilot in Chicago and a stakeholder workshop, the report finds that AER can reduce pollution by 5–40% for specific loads and lower customer acquisition costs for utility demand response programs. It proposes five priority near-term initiatives: institutional and residential pilots, device certification, integration into GHG accounting protocols, and the creation of open-source infrastructure.