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The Union of Concerned Scientists (UCS) identifies that all of Georgia's oceanfront communities face chronic inundation by 2100 under an intermediate sea level rise scenario. The report highlights that Savannah and Brunswick will see significant land area loss by 2045 and 2060, while suggesting that limiting global warming to 1.8°C could spare some communities. It advocates for a science-based approach to adaptation, including updating flood maps, reforming insurance, and creating relocation programs.

The Union of Concerned Scientists (UCS) warns that many Louisiana communities face 'chronic inundation'—defined as high tide flooding 10% or more of usable, non-wetland area at least 26 times per year—within the coming decades. Under an intermediate sea level rise scenario, 95 southern Louisiana communities will face this by 2035, increasing to 131 by 2100. In the high scenario, some areas, including all communities in Lafourche and Terrebonne Parishes, could see 90 to 100 percent of their land area chronically inundated by the end of the century. The report argues for a science-based approach to adaptation, including updating flood risk maps, reforming insurance, and creating programs for retreat and relocation.

The Union of Concerned Scientists (UCS) identifies numerous Maryland communities, particularly on the Eastern Shore, at risk of chronic inundation—defined as high tide flooding 10% or more of usable non-wetland area at least 26 times per year. Under an intermediate sea level rise scenario, 22 communities will face this by 2035 and 17 more by 2100, with some areas like Crisfield facing flooding of over half its land area within 20 years. The report emphasizes that limiting global warming could spare between 9 and 31 communities from chronic inundation by the end of the century and calls for updated flood maps, reformed insurance, and funded relocation programs.

The Union of Concerned Scientists (UCS) identifies Massachusetts communities at risk of 'chronic inundation'—defined as high tide flooding 10% or more of usable, non-wetland area at least 26 times per year. Under an intermediate sea level rise scenario, five communities will face this by 2060 and 13 by 2100. Under a high scenario, those five communities will be affected by 2045, with 23 communities affected by 2100. The report highlights that working-class towns like Chelsea and Revere are particularly vulnerable, with up to 30% of Chelsea's land area potentially chronically inundated by 2060. The UCS argues that limiting warming to approximately 1.8°C could spare several communities, including Boston and Cambridge, from this fate. Recommended responses include phasing out risky coastal development, enhancing FEMA's mitigation programs, and creating new policies for managed retreat and relocation.

The Union of Concerned Scientists identifies that under a high sea level rise scenario, four New Hampshire communities will face chronic inundation by 2100, defined as high tide flooding 10% or more of usable non-wetland area at least 26 times per year. While the 10% threshold is reached late in the century due to inland areas and higher elevations, low-lying neighborhoods in towns like Seabrook and Hampton already experience disruptive flooding. The report suggests that limiting warming to 1.8°C could spare up to four communities from this fate. Recommended policy responses include phasing out risky coastal development, enhancing FEMA's disaster response frameworks, and creating new programs for retreat and relocation.

The Union of Concerned Scientists (UCS) identifies significant risks of chronic inundation for New Jersey coastal communities, with 21 communities expected to be affected by 2035 under an intermediate scenario and over 100 by 2100. The report highlights that major metropolitan areas like Newark and Elizabeth face substantial land loss by 2100 and suggests that limiting global warming to 1.8°C could spare dozens of communities from this fate. To address these risks, UCS advocates for phasing out risky coastal development, enhancing disaster response funding, and creating new policies for managed retreat and relocation.

The Union of Concerned Scientists (UCS) identifies New York communities at risk of 'chronic inundation'—defined as high tide flooding 10% or more of usable, non-wetland area at least 26 times per year. Under a high sea level rise scenario, 14 New York communities will face this by 2100, including four New York City boroughs, with significant impacts on Manhattan (12%), Queens (15%), and Brooklyn (15%). Some areas, such as Coney Island and Long Beach, could face chronic inundation as early as 2060. The document argues that curtailing warming to approximately 1.8°C could spare between three and 13 communities by 2100. To address these risks, UCS recommends phasing out risky coastal development, enhancing disaster response frameworks like FEMA's grants, and creating new policies for managed retreat and relocation.

The Union of Concerned Scientists (UCS) identifies numerous North Carolina communities facing 'chronic inundation'—defined as high tide flooding 10% or more of usable, non-wetland area at least 26 times per year—by 2035 and 2100. Under an intermediate scenario, 13 communities will face this by 2035 and 36 by 2100; under a high scenario, 43 will be affected by 2060 and 63 by 2100. The report emphasizes that curtailing warming could spare between 23 and 37 communities from chronic inundation by the end of the century. Recommended actions include updating flood risk maps, reforming insurance, enhancing FEMA funding, and creating programs for managed retreat and relocation.

The Union of Concerned Scientists identifies numerous South Carolina communities at risk of chronic inundation—defined as high tide flooding 10% or more of usable non-wetland area at least 26 times per year. Under an intermediate scenario, two communities will face this by 2035 and 19 by 2100; under a high scenario, 22 communities will be affected by 2100, with significant impacts on Charleston, Hilton Head, Edisto Island, and Kiawah Island by 2060. The report argues that limiting warming to 1.8°C could spare up to 10 communities from this fate and calls for updated flood maps, reformed insurance, and funded relocation programs.

The Union of Concerned Scientists (UCS) identifies numerous Texas communities at risk of 'chronic inundation'—defined as high tide flooding 10% or more of usable, non-wetland area at least 26 times per year. Under an intermediate scenario, two communities (Bolivar Peninsula and Sabine Pass) will face this by 2035, increasing to 17 by 2100. In a high scenario, Galveston faces chronic inundation by 2030 and Port Arthur by 2070. The report argues that limiting warming to approximately 1.8°C could spare several communities from this fate and calls for updated flood risk maps, reformed insurance, and funded relocation programs.

The Union of Concerned Scientists (UCS) identifies that multiple Virginia communities face 'chronic inundation'—defined as high tide flooding 10% or more of usable, non-wetland area at least 26 times per year—by 2100. Under an intermediate scenario, three communities will be affected by 2035 and 21 by 2100; under a high scenario, 38 communities will be exposed by the century's end. The report highlights specific risks to Poquoson, Norfolk, Virginia Beach, Hampton, and military installations like Joint Base Langley-Eustis and Naval Air Station Oceana Dam Neck Annex. It argues that limiting global warming to approximately 1.8°C could spare 16 to 30 communities from this fate by 2100. Recommended responses include phasing out risky coastal development, enhancing FEMA's mitigation grants, and creating new programs for retreat and relocation.

The report examines the potential for electric vehicles to act as flexible loads to balance electricity supply and demand, particularly to mitigate the 'duck curve' caused by high solar penetration. It analyzes technical barriers, utility roles, and rate designs, concluding that managed charging can reduce system costs and emissions if aligned with clean energy availability.

The document examines how California's LCFS and Cap-and-Trade Program work together to reduce transportation emissions. The LCFS mandates a reduction in the carbon intensity of fuels, while Cap-and-Trade puts a price on carbon and generates revenue for clean technology investments. The author argues that neither policy is sufficient alone and recommends extending both to 2030 to provide the stability needed for long-term infrastructure and vehicle transitions.

The document examines biomethane derived from landfills, wastewater treatment centers, and dairies as a replacement for diesel and natural gas in California's heavy-duty vehicle fleets. While acknowledging its climate benefits over fossil fuels, the authors highlight that California's total biomethane potential from waste would meet only 3% of the state's natural gas demand and 15% of its diesel consumption. The report warns that promoting compressed natural gas (CNG) vehicles could inadvertently increase reliance on fossil natural gas due to this supply gap. It concludes that biomethane provides the greatest emissions reductions when used to generate electricity or hydrogen for electric vehicles, but that battery electric vehicles powered by the grid remain the most effective path for meeting climate goals.

The provided text consists of appendices detailing an optimization model to assess the scalability of diversified crop rotations in Iowa, the potential for substituting corn with oats and alfalfa in livestock feed, and methodologies for calculating soil erosion and greenhouse gas emissions. It argues that longer rotation systems can maintain profitability while improving soil health and reducing pollution. The analysis includes specific scenarios for converting corn acreage in the most erodible counties and across the entire state, utilizing non-linear models to estimate nitrous oxide (N2O) reductions and carbon sequestration benefits.

The report analyzes the benefits of diversified crop rotations compared to the dominant corn-soybean system in the US Corn Belt, specifically focusing on Iowa. Based on research from Iowa State University's Marsden Farm, the authors find that three- and four-year rotations increase yields for corn and soybeans and maintain similar net profits while reducing herbicide and synthetic nitrogen fertilizer use. The report models the scalability of these systems, suggesting that implementing no-till diverse rotations on 3.6 million of Iowa's most erodible acres could reduce soil erosion by 91% and save taxpayers up to $198 million annually in water cleanup costs. It further suggests that up to 40% of Iowa's farmland could be converted to these systems if livestock feed markets adapt. To overcome financial, market, and technical barriers, the report recommends expanding USDA incentives, improving Whole Farm Revenue Protection insurance, and increasing funding for agroecological research.

The document argues that replacing a portion of Midwest corn and soybean acreage with diverse crop rotations—including oats and alfalfa—can increase yields and maintain profits while significantly reducing soil erosion, chemical runoff, and greenhouse gas emissions. Based on Iowa State University research and Union of Concerned Scientists modeling, the report suggests that such systems could be scaled to 20-40% of Iowa's farmland, potentially saving taxpayers hundreds of millions of dollars in water cleanup costs. However, adoption is hindered by market, financial, and technical barriers, necessitating federal policy reforms in crop insurance, USDA loan funding, and agricultural research.

The report argues that electrifying heavy-duty vehicles in California can significantly reduce hazardous air pollutants and global warming emissions while creating economic opportunities. It finds that battery and fuel cell electric buses have substantially lower life cycle emissions than diesel or CNG alternatives. The authors highlight that low-income communities and people of color are disproportionately exposed to heavy-duty vehicle pollution. While the sector offers growth in manufacturing, infrastructure, and maintenance, the report emphasizes the need for targeted electrical skills training to make these jobs accessible to underserved populations.

The document outlines twelve key signs of climate change, including rising global, ocean, and soil temperatures, increasing ocean acidity, and rising sea levels. It attributes these phenomena to the buildup of heat-trapping gases caused by the burning of fossil fuels and the destruction of tropical forests. The text highlights specific regional impacts, such as the rapid warming of the Gulf of Maine and the thawing of permafrost in the Arctic, and notes the resulting increase in extreme weather events and shifts in species ranges.

The Union of Concerned Scientists (UCS) developed the Clean Energy Momentum State Ranking to evaluate how US states are driving the transition to clean energy. The ranking uses 12 metrics across three categories: technical progress (renewable energy generation, energy savings, and electric vehicle sales), direct effects (job creation and pollution reduction), and future-oriented policies (renewable energy, energy efficiency, and carbon reduction). California is identified as the overall leader, while Vermont, Massachusetts, Rhode Island, and Hawaii also rank in the top five. The analysis concludes that state-level leadership is critical for national momentum, particularly in creating jobs and improving public health, and recommends that states facilitate business involvement and improve energy equity for low-income communities.