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The study identifies two primary sources of in-cabin pollution in conventional school buses: the tailpipe and the engine crankcase. It finds that while diesel particulate filters (DPF) combined with ultra-low sulfur diesel (ULSD) eliminate ultrafine particles, black carbon, and PAH, they do not reduce fine particulate matter (PM2.5) because that pollutant originates from the crankcase. The most effective solution for comprehensive elimination of all measured particles is the combination of a DPF, ULSD, and a Donaldson Spiracle closed-crankcase filtration device.

The report examines Chile's transition from military dictatorship to a stable democracy, highlighting how the combination of liberal economic policies and progressive social initiatives led to an average GDP growth of 7% in the 1990s. Key success factors include pragmatic leadership, public-private partnerships, and a strategic focus on trade diversification and foreign direct investment. The document suggests that African nations can emulate Chile's approach by completing structural reforms, prioritizing infrastructure, and using increased tax revenues to fund social services without abandoning long-term macroeconomic stability.

The report analyzes South Korea's transition from a poor nation to an OECD member, highlighting the integration of education with industrial planning. It emphasizes the influence of Confucianism, the impact of Japanese colonial vocational structures, and the strategic vision of President Park Chung Hee. The author argues that Korea's success stemmed from a coherent 'regime' where education targets were synchronized with job creation and industrial goals. The document concludes by suggesting that African states can benefit from enhancing state capacity and linking education policies to concrete development objectives.

The report examines the shift of tax burdens from labour to consumption and natural resource use, known as Ecological Tax Reform (ETR). It analyzes how EU nations have used energy, transport, and pollution taxes to internalize environmental costs while maintaining economic competitiveness. The document highlights that successful ETRs often combine tax increases on pollutants with reductions in social security or income taxes, creating a 'double dividend' of environmental improvement and increased employment. Based on these international experiences, the report suggests that Estonia should phase out subsidies for its oil-shale energy sector, introduce carbon-based energy taxes, and implement differentiated vehicle taxes to stimulate resource efficiency and sustainable development.

The report finds that polyester is the most energy-intensive and highest CO2 emitter, while hemp generally has the lowest Ecological Footprint. Cotton, particularly in Punjab, exhibits the highest Ecological Footprint due to low productivity and high land requirements. Water analysis reveals that cotton is extremely water-intensive, requiring between 9,788 and 9,958 litres per kilogram of lint, whereas polyester's water use is negligible in comparison.

The report ranks the 'Big Six' automakers—Honda, Nissan, Toyota, Ford, DaimlerChrysler, and General Motors—on their environmental performance, focusing on smog-forming and heat-trapping emissions. Honda consistently ranks as the cleanest, while General Motors has fallen to the bottom. The analysis highlights a trend where smog-forming pollution is improving due to regulation, but heat-trapping emissions remain stagnant. It specifically criticizes the use of regulatory loopholes, such as Flex-Fuel Vehicle (FFV) credits, which allow companies to artificially inflate fuel economy figures.

The document analyzes the 'second wave' of regionalism in trade, characterized by a shift toward bilateral agreements and 'deeper integration' involving investment and intellectual property rights. It surveys various agreements (including NAFTA, ASEAN, and EU partnerships) to evaluate how they handle environmental exceptions, capacity building, and investor-state dispute settlement. The paper argues that while regionalism can pioneer new policy approaches, it risks creating a 'spaghetti bowl' of conflicting rules and may undermine the multilateral system by eroding the most-favoured-nation principle and restricting the policy space of developing nations.

The briefing introduces action targets, which require an entity to reduce emissions by an agreed percentage of its actual emissions during a commitment period. By using an 'observable baseline' of actual emissions rather than projected ones, action targets eliminate the uncertainty associated with future economic growth. A comparison of a 2% target for Brazil, China, India, and Mexico shows that fixed targets can lead to either burdensome reductions or 'hot air' depending on GDP growth, while action targets maintain a consistent level of effort. The authors suggest action targets are compatible with the Kyoto Protocol and suitable for modest developing country commitments, though further research is needed on their environmental impact and administrative costs.

The report analyzes the potential health impacts of three policy alternatives to the proposed Clear Skies Act—the Clean Air Planning Act (Carper), the Clean Power Act (Jeffords), and the EPA August 2001 Straw Proposal—focusing on avoidable health effects from fine particulate matter (PM2.5) for the years 2010 and 2020. To ensure direct comparability with U.S. Environmental Protection Agency (EPA) estimates, the study employs the same analytical methods, emissions estimates, air quality forecasting, and health assessment models used by the EPA in its 2003 analysis of the Clear Skies Act.

The document examines the transition of the global coffee chain from a regulated regime under the International Coffee Agreement to a 'roaster-driven' buyer-driven chain. It evaluates the effectiveness of sustainability certifications—including Fair Trade, Organic, Utz Kapeh, and Shade-grown—in addressing economic, social, and environmental sustainability. The author argues that while these standards can provide premiums and market access, they often create new entry barriers and are frequently controlled by consuming-country actors, potentially reinforcing buyer-driven governance.

The document examines the principles of multi-stakeholder governance, focusing on the balance between legitimacy and efficiency. It analyzes the governance models of the Forest Stewardship Council (FSC), Marine Stewardship Council (MSC), Social Accountability International (SAI), Ethical Trading Initiative (ETI), Fairtrade Labelling Organizations International (FLO), and the Sustainable Agriculture Network (SAN). The author argues that while technical activities like finance and research can operate under simpler governance, the development of ethical standards requires sophisticated mechanisms to ensure balance between interest groups and North-South representation. The paper concludes by recommending a stepwise approach for the Sustainable Coffee Partnership, suggesting a hybrid structure combining elements of ETI for initial phases and a mix of FSC and FLO for standardization efforts.

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 argues that sub-Saharan Africa's focus on Universal Primary Education (UPE) is insufficient for economic development if not paired with a robust secondary education sector. It identifies critical gaps in teacher quantity and quality, the devastating impact of HIV/Aids on educators and students, and the prevalence of corruption in school funding. The document advocates for a shift toward vocational training, science and mathematics education, and a 'basic education' framework (extending to age 16) to avoid a bottleneck of primary graduates who cannot progress. It highlights East Asia's historical success in integrating education planning with job creation as a model for the continent.

The report evaluates Estonia's implementation of the Aarhus Convention's three pillars: access to information, public participation, and access to justice. It finds that while legal frameworks are generally in place and information quality is high, practical implementation varies. Access to information is stronger than public participation, which often occurs too late in the decision-making process to be substantive. Access to justice is recognized by courts, allowing environmental NGOs to challenge decisions. The report recommends clearer procedures for emergency notifications, better accessibility of corporate pollution data, and more inclusive, early-stage public consultations.

The Union of Concerned Scientists report 'A Blueprint for Saving Lives, Money, and Gasoline' analyzes the safety and environmental shortcomings of SUVs and light trucks in the United States. It highlights high rollover fatality rates, significant air pollution, and poor fuel economy compared to passenger cars. To demonstrate potential improvements, the authors propose two model vehicles—the UCS Guardian and the UCS Guardian XSE—which utilize existing technologies such as unibody construction, advanced engines, and electronic stability control to increase fuel efficiency and reduce fatalities without sacrificing vehicle size or performance.

The document presents simulations of pollen transport by wind, highlighting that deposition is highly non-uniform and patchy, characterized by 'fingers' and 'islands'. It argues that setting separation distances to avoid crop contamination is difficult because pollen travel distance increases with wind strength and substantial deposition can occur at very large distances, including in the upwind direction due to high-altitude transport. The authors used a Cellular Automaton model, validated against historical observations of maize, to demonstrate these qualitative findings.

The Union of Concerned Scientists (UCS) graded U.S. states on their commitment to renewable energy, finding that 34 states received failing grades (D or F) and only 16 passed. While 19 states have enacted standards or funds projected to add 15,215 MW of capacity by 2017, the gains are highly concentrated, with California and Texas accounting for nearly 60 percent of forecasted new development. The report argues that current state-level efforts are insufficient compared to the technical potential of wind, solar, bioenergy, geothermal, and landfill gas, and advocates for a national renewable electricity standard to achieve more equitable and cost-effective energy generation.

The document outlines a framework for 'green building' that prioritizes materials with low embodied energy, minimal toxicity, and high recyclability. It argues that the Industrial Revolution's reliance on fossil fuels and non-local materials has stressed global life support systems and degraded indoor air quality. The author recommends specifying low-VOC products, utilizing local masonry or adobe, and considering the high carbon footprint of cement, which accounts for over eight percent of human CO2 emissions worldwide. The guide also compares the energy efficiency and environmental trade-offs between steel and wood framing, while advocating for engineered wood products and reclaimed timbers to protect old-growth forests.

The report examines the deployment of first-generation GMO crops in the US and Argentina. It finds that while RR soybeans facilitate no-till farming and replace more toxic herbicides, they often result in a 5-10% yield drag and increased total herbicide volume. The author warns that high selection pressure, particularly in Argentina, risks accelerating weed resistance and shifts. Additionally, the paper highlights emerging concerns regarding glyphosate's impact on soil microbial communities, specifically the buildup of Fusarium fungi, and potential impairments to plant immune responses and nitrogen fixation.

The report contrasts ecological farming with chemical and GM agriculture, asserting that the latter degrades soil and harms the food chain. It cites historical and modern evidence that biodiverse, organic methods increase crop yields and improve the health of plants, animals, and humans, while GM crops are linked to lower yields, increased herbicide use, and potential soil fertility damage.