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The report evaluates U.S. school bus emissions, finding that older diesel buses release significantly more soot than modern alternatives, posing health risks to children. It grades states on soot emissions, cleanup programs, and smog-forming pollution, noting wide performance gaps. The authors recommend a strategy of 'the five Rs'—retrofitting, refueling, replacement, repair, and reduced idling—and call for strengthened federal standards and increased funding to modernize fleets.

The Clean Air Task Force (CATF) advocates for the Diesel Emissions Reduction Act of 2005 (DERA), a proposed $1 billion federal grant and loan program to reduce diesel fine particle (PM2.5) emissions. CATF highlights that diesel exhaust causes 21,000 premature deaths annually and that existing engines will remain in service for decades, necessitating funding for retrofits, rebuilds, and repowerings to meet air quality standards and provide immediate climate benefits by reducing black carbon.

The document assesses the environmental and health impacts of shipping emissions, noting that they are significantly less regulated than land-based sources. It provides data on global and regional emission inventories, specifically for Europe and the United States, and compares these to land-based mobile sources. The report details several cost-effective mitigation strategies, including the use of low-sulphur fuel, seawater scrubbing, engine modifications, selective catalytic reduction (SCR), and shore-side electrical power ('cold ironing').

The report estimates that diesel fine particle pollution causes approximately 21,000 premature deaths annually in the U.S., with significant risks of lung cancer, heart attacks, and asthma. It argues that while EPA regulations for new engines starting in 2007 are positive, the long lifespan of existing diesel vehicles (nearly 30 years) necessitates immediate retrofit actions. The document proposes a reduction target of 50% by 2010, 75% by 2015, and 85% by 2020, which could save nearly 100,000 lives by 2030. Recommended solutions include diesel particulate filters (DPF), Ultra Low Sulfur Diesel (ULSD), and anti-idling ordinances.

The San Joaquin Valley shares the distinction of having the worst air quality in the United States, driven by a combination of geographic trapping, rapid population growth, and a history of regulatory neglect. The region struggles with chronic ozone and particulate matter (PM) pollution, which disproportionately affects vulnerable populations and damages the agricultural economy. While recent legislation has begun to regulate previously exempt agricultural sources and diesel emissions, the report argues that coordinated action across jurisdictional levels is required to address emissions from sources outside local control, such as heavy-duty trucks and locomotives.

The document consists of several appendices. Appendix A lists Class I areas not evaluated by the EPA. Appendix B compares SO2 and NOx reductions under CAIR versus the Best Available Retrofit Technology (BART) standard. Appendix C is a detailed scientific critique of the ARIES study, arguing that utility industry claims using ARIES to downplay the health risks of sulfates are not supported by the study's actual data or broader medical literature. Appendix D lists counties remaining in nonattainment for PM2.5 and ozone. Appendix E contains a statement from the Institute of Clean Air Companies on the achievability of NOx and SO2 limits. Appendices F through L provide detailed modeling data, cost summaries, and emission projections for various policy scenarios (CATF11, 18, 19, 21, 22, 23).

The report details how Hispanic Americans are disproportionately exposed to air pollution, with 71 percent living in counties violating federal air quality standards as of 2002. It identifies specific health risks including asthma, stunted lung growth, and low birth weight, exacerbated by poverty and lack of health insurance. The document also notes risks from mercury contamination in fish and the potential for global warming to induce crop failures and famines. Finally, it argues that the EPA has failed to implement Executive Order 12898 because it has not identified impacted populations or developed criteria for determining disproportionate risk.

This report analyzes the health impacts of various US power plant emission reduction policies, comparing the Clear Skies Act (CSA) with the Carper Bill, Jeffords Bill, and an EPA Straw Proposal. Using the REMSAD air quality model and BenMAP health analysis tool, the study quantifies avoidable cases of premature mortality, chronic bronchitis, heart attacks, and respiratory/cardiovascular hospitalizations. The findings indicate that the Jeffords Bill provides the highest health benefits in both 2010 and 2020, while the CSA provides the lowest among the policy options. The report also includes a 'No EGU' scenario to establish the total health footprint of coal-fired electricity generating units.

The report compares conventional, advanced, and hybrid-electric diesel and gasoline vehicles across five passenger vehicle classes. It finds that while diesel engines offer higher inherent fuel economy, they are less cost-effective than improved gasoline vehicles for reducing oil use and heat-trapping gases due to higher up-front costs and the higher petroleum intensity of diesel fuel. The report also highlights significant public health concerns, noting that diesel vehicles historically emit substantially more toxic soot and nitrogen oxides than gasoline vehicles. While new federal Tier 2 standards aim to close this gap, the report argues that diesel's future depends on overcoming technical challenges in emissions control and ensuring real-world performance matches certification. It recommends maintaining strict emissions standards, modifying CAFE to use energy-equivalent measures, and expanding inspection and maintenance programs to include diesel vehicles.

The report details how African Americans are disproportionately exposed to power plant emissions due to residential concentration in urban centers and proximity to facilities. It links these emissions to higher rates of asthma, infant mortality, and mercury exposure, while highlighting the compounding effects of poverty and lack of healthcare. The authors advocate for new legislation to reduce sulfur dioxide, nitrogen oxides, mercury, and carbon dioxide, and specifically call for the elimination of the 'grandfather' exemption in the Clean Air Act's New Source Review program.

The report argues that the health benefits of enforcing New Source Review (NSR) on 51 violating power plants significantly outweigh the costs of installing Best Available Control Technology (BACT). Using EPA-approved methodologies, the analysis estimates that cleaning up these plants would avoid thousands of premature deaths and tens of thousands of asthma attacks annually, with benefits valued at $24-38 billion against an annual cost of approximately $3.6 billion.

The report details how power plant emissions—including particulate matter, ozone, sulfur dioxide, and mercury—disproportionately harm children due to their developing physiology and higher activity levels. It links these pollutants to asthma, stunted lung growth, neurological deficits, and infant mortality, while advocating for nationwide emission caps and a transition to cleaner energy.

The report evaluates the emissions of US school bus fleets, finding that the vast majority rely on high-polluting diesel engines that pose significant health risks to children. It advocates for a transition to cleaner alternatives, specifically natural gas, and calls for federal and state funding to replace aging fleets.

The document details the severe impacts of sulfur emissions from coal-fired power plants in the US Midwest, specifically Indiana, Illinois, Ohio, Michigan, Minnesota, and Wisconsin. It links these emissions to premature deaths, respiratory and cardiovascular diseases, and environmental degradation including acid rain and haze. The report advocates for the adoption of sulfur-scrubbing technologies and tighter EPA air quality standards to mitigate these risks.

The report argues that 51 coal-fired power plants in the U.S. have illegally avoided modern pollution controls by exploiting a 'grandfathering' loophole in the Clean Air Act, leading to significant public health crises. Drawing on data from Abt Associates, the Clean Air Task Force estimates that these plants cause between 5,500 and 9,000 premature deaths and 107,000 to 170,000 asthma attacks annually. The report highlights a 'transport of death and disease' where pollution from plants in the Midwest and Southeast impacts the Northeast. It criticizes the Bush Administration's 2001 review of NSR policy as prioritizing industry efficiency over public health and calls for the closure of the 'lethal loophole' through nationwide emission caps on nitrogen oxides, sulfur dioxide, mercury, and carbon dioxide.

The report argues that coal is the 'dirtiest of all fuels' and that its entire lifecycle—mining, preparation, transport, combustion, and waste disposal—causes extensive damage to human health and ecosystems. It highlights the failure of regulatory enforcement and the disproportionate impact on vulnerable populations.

The report argues that while diesel trucks and buses are essential for commerce, they are disproportionate sources of smog, soot, and greenhouse gases. It evaluates a transition from conventional diesel to a 'green truck path' involving advanced exhaust controls, natural gas, hybrids, and fuel cells. The authors model a 2030 scenario where aggressive policies could reduce pollutant emissions by over 90% and global warming pollutants by 26%, while maintaining current oil consumption levels despite doubling truck travel.

The report analyzes the health impacts of ground-level ozone in the Eastern United States, specifically the OTAG region, using 1997 monitoring data and epidemiological concentration-response functions. It estimates that ozone exposure led to 53,000 respiratory hospital admissions, 16,000 cardiovascular hospital admissions, and 159,000 total respiratory emergency room visits during the April-October 1997 season. The analysis highlights significant uncertainty regarding mortality and chronic illness, which were excluded from the quantitative estimates. The findings are compared with a study by the American Lung Association, showing reasonably close results for respiratory admissions.

The study monitored dust deposition near coal-fired power stations in North Yorkshire over two years, identifying a significant contribution of cenospheres from the Drax Power Station fly-ash tip to dust levels in the village of Barlow.

The report estimates that the Coal Phase-Out Regulations, Clean Electricity Regulations (CER), Volatile Organic Compound (VOC) Regulations, and Methane Regulations will provide between $18 billion and $21 billion in direct health benefits by 2050. These savings, primarily derived from respiratory benefits of reduced emissions, are equivalent to the cost of 2,200 to 2,500 doctors over a 36-year period. The regulations target pollutants including particulate matter, benzene, mercury, lead, NOX, SOX, PM2.5, and VOCs.