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The Union of Concerned Scientists analysis finds that California's cleaner fuels and vehicle policies—including cap and trade, the low carbon fuel standard, and vehicle standards—will reduce ownership costs for drivers. Weekly savings for new vehicle owners are projected to increase from $3.90 for a 2015 model to $8.98 for a 2025 model compared to a 2008 baseline. A 10-year-old used car purchased in 2025 is estimated to save its driver $7.46 per week compared to a similar used car purchased in 2015.

The document compiles several reports indicating that AB 32's economic impact on small businesses is manageable, green jobs are outperforming the general economy, and diversifying the energy portfolio could increase Gross State Product and employment. It contrasts these findings with a study by Varshney and Tootelian, which it characterizes as unsound and unreliable for ignoring cost savings. Additionally, it warns that inaction on climate change could risk trillions of dollars in California assets.

The document provides the technical basis for estimating EV charging emissions and costs in the US. It explains the use of average emissions intensity based on EPA eGRID data, adjusted for transmission losses and upstream feedstock emissions. It also describes a modified Oak Ridge Competitive Electricity Dispatch (ORCED) model used for hourly emissions estimates. Additionally, it outlines the process for calculating residential charging costs across 50 US cities, accounting for tiered rates, time-of-use (TOU) plans, and specific utility data.

The document outlines a technical framework for calculating fuel use across various truck types—including tractor-trailers, straight trucks, and cargo vans—using data from the Freight Analysis Framework (FAF) and the Vehicle Inventory and Use Survey (VIUS). It establishes baseline fuel economies (e.g., 5.8 mpg for tractor-trailers) and projects improvements by 2025 based on technology packages such as aerodynamic devices and hybrid-electric powertrains. Additionally, it applies these methodologies to estimate the current fuel use and future savings for the fleets of UPS, FedEx, PepsiCo, The Coca-Cola Company, and Walmart.

Dr. Juan Declet-Barreto highlights that nations with the lowest contributions to the climate crisis, particularly in the Global South and Small Islands, suffer disproportionately due to exposure and inequitable development. He asserts that marginalized groups based on income, race, ethnicity, gender, or colonization will continue to face the most severe losses and damages. He calls for policymakers to prioritize equitable solutions, integrate Indigenous and local knowledge, and demands that wealthy nations, specifically the United States, provide financial reparations for historic emissions.

The Union of Concerned Scientists (UCS) conducted a survey of 1,586 EPA scientists, finding that 60 percent experienced political interference in the five years preceding the report. The study details how political appointees and the White House Office of Management and Budget (OMB) manipulated scientific findings on issues like climate change and mercury pollution. It also highlights barriers to free communication, such as fear of retaliation and restrictions on media contact, and notes a decline in job satisfaction and resources. The report recommends elevating the EPA to a cabinet-level agency, strengthening whistleblower protections, and increasing transparency in regulatory decision-making.

The document details the construction of the EW3 database, which integrates 2008 Energy Information Administration (EIA) data with NREL and Argonne National Laboratory water coefficients to estimate freshwater withdrawals and consumption. It describes the process of mapping cooling systems to specific generators, using Google Earth to verify cooling types, and applying the Water Supply Stress Index (WaSSI) to identify watersheds where electricity generation significantly increases water stress. The methodology also covers the projection of water use through 2036 using the Regional Energy Deployment System (ReEDS) model and the calculation of water and carbon intensities for the top 15 U.S. electricity providers.

The document advocates for the widespread adoption of aerodynamic devices and high-performance tires for heavy-duty trucks to lower fuel consumption and emissions. It highlights that these retrofits can save a typical long-range truck 2,000 gallons of diesel annually and could reduce California's global warming pollution emissions by 17 million metric tons of CO2eq by 2020. The text identifies market barriers such as split ownership and lack of standardized testing, proposing that California lawmakers implement performance-based standards and retrofit requirements to meet climate and air quality goals.

The Union of Concerned Scientists (UCS) and the Government Accountability Project (GAP) found widespread political interference in U.S. federal climate science, including pressure to alter findings and restrict communication. Survey data shows that 58% of federal climate scientists experienced interference in the five years prior to the report, contrasting sharply with the experience of non-federal scientists at NCAR. The report highlights barriers to media access, declining inflation-adjusted funding since the mid-1990s, and poor morale, recommending reforms to ensure scientific openness and the 'right of last review' for scientists.

The Union of Concerned Scientists advocates for a 'count carbs and make carbs count' approach to transportation fuels, emphasizing the need for life cycle emissions analysis to distinguish between high-carbon fuels like liquid coal and low-carbon alternatives like cellulosic ethanol. The report highlights that while some biofuels can significantly reduce emissions, others may increase them depending on feedstock and land use. It promotes the adoption of Low Carbon Fuel Standards, citing California's model, to drive the market toward sustainable, low-carbon fuels and avoid the high emissions associated with liquid coal and tar sands.

The report finds that diesel pollution caused an estimated 3,000 premature deaths and $21.5 billion in health costs in California in 2004. While new engine standards help, the majority of pollution comes from existing engines, and the state's Diesel Risk Reduction Plan is at risk of failing due to funding gaps and regulatory delays. The Union of Concerned Scientists argues that investing in incentive programs like the Moyer Program provides high returns, reducing public health costs by $9 to $16 for every dollar invested.

The document describes a 'system-wide epidemic' of political interference in federal climate science, where 150 out of 279 surveyed scientists reported at least 435 occurrences of interference over five years. Examples include the watering down of NASA press releases, the cancellation of NOAA media plans, and the use of 'minders' to monitor scientist interviews. While 88% of respondents believe the quality of federal climate science remains strong, they report a 'chilling effect' and warn that funding cuts to long-term monitoring threaten future research. The Union of Concerned Scientists recommends strengthening whistleblower protections and ensuring scientists have the final review of communications regarding their findings.

Inland flooding in the United States is driven by a combination of climate-induced increases in heavy rainfall and land-use practices that reduce the landscape's ability to absorb water. Rising global temperatures increase evaporation and the atmosphere's capacity to hold water vapor, leading to more frequent and heavier precipitation. Additionally, the destruction of natural areas, development in floodplains, and the creation of impermeable surfaces like asphalt exacerbate flood risks.

The document argues that corporate interests corrupt federal science through research suppression, scientist intimidation, and the manipulation of regulatory processes. It details how these entities shape public perception by promoting false uncertainty and utilizing 'revolving door' officials to capture regulatory agencies. While acknowledging initial steps taken by the Obama administration to improve transparency and ethics, the report calls for comprehensive federal reforms, including stronger whistleblower protections, stricter conflict-of-interest rules for advisory panels, and increased transparency regarding corporate lobbying and funding.

The technical appendices describe the use of a Global Trade Analysis Project (GTAP) general equilibrium model to simulate the effects of adopting the MyPlate and Harvard Healthy Eating Plate dietary guidelines. The analysis focuses on the resulting shifts in U.S. crop acreage, specifically the reduction of cereal grain production in favor of fruits, vegetables, and other crops. Key findings include a projected 8% decline in U.S. cereal grain acreage under the Harvard scenario and significant changes in land rental rates and production levels for various food sectors.

The review finds that while Indonesia's moratorium covers 42.5 million hectares of primary forests and peat lands, it provides additional protection to only 13.7 million hectares (13%) after accounting for existing protections. The authors argue the moratorium is unlikely to meet national emission targets in its current form because it excludes secondary forests and existing concessions, and suffers from enforcement gaps and a lack of data transparency.

The report projects substantial warming and shifting precipitation patterns for the US Midwest, with extreme heat events and heavy rainfall becoming more frequent. Under a higher emissions scenario, end-of-century temperatures could rise by up to 10°F, significantly increasing the frequency of severe heat waves and reducing snow cover. While annual precipitation may only increase slightly, winter and spring are expected to become wetter, while summer precipitation may decrease under higher emissions. These changes are projected to increase heat-related mortality and flooding risks across the region.

The San Joaquin Valley faces severe air quality issues, with Bakersfield and Merced identified as the most ozone-polluted cities in the US in 2003. The region failed to meet federal health standards for fine particulate matter by 2004, with agriculture and heavy transport identified as primary emission sources.

The Union of Concerned Scientists and various endorsing organizations call for U.S. legislation to limit global warming to 2 degrees Celsius. The proposal advocates for economy-wide emission cuts of 25% by 2020 and 80% by 2050 (relative to 1990 levels), the implementation of a cap-and-auction system to fund mitigation and climate justice, and a strategic shift toward renewable energy and energy efficiency to create green-collar jobs and protect vulnerable communities.

The document examines the environmental impact of palm oil production, specifically focusing on the release of carbon dioxide from the deforestation of tropical forests and the drainage of peatlands. It highlights Indonesia and Malaysia as the primary producers and discusses the resulting loss of biodiversity and increased greenhouse gas emissions. The text suggests that global demand can be met without further ecosystem destruction by improving yields, utilizing degraded lands, and implementing stronger government policies and corporate commitments.