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The report finds that King County's 2008 emissions were 23.4 million MTCO2e via geographic accounting and 55 million MTCO2e via consumption accounting. Transportation and buildings are the primary local sources, while consumption-based emissions are driven by imported goods and services. The report recommends a 'Core' tracking framework focusing on buildings, transportation, and waste.

The report explains the difference between traditional and consumption-based emissions accounting, noting that Sweden's consumption-based emissions are approximately double its national emissions. It introduces REAP, a tool developed by the Stockholm Environment Institute that uses multi-regional input-output (MRIO) models and geodemographic data to calculate the environmental footprint of Swedish consumption at national, regional, and local levels. The document provides case studies from Luleå, Härjedalen, and Lund to demonstrate how REAP's scenario function can model the impact of policy changes in transport, energy, and food waste on greenhouse gas emissions and the ecological footprint.

The report finds that Oregon's consumption-based emissions footprint in 2005 was 78 million metric tons of CO2e, which is 47 percent greater than the emissions released within state boundaries. The largest contributors to these emissions are personal vehicles, appliances, and food and beverages, which together account for half of the total impact. The analysis highlights that a significant portion of Oregon's emissions (54%) are released outside the state due to international and national supply chains. The authors recommend that Oregon adopt regular consumption-based inventories and set specific emissions-reduction targets for consumption to maximize global climate benefits.

The document details California's efforts to reduce greenhouse gas emissions to 1990 levels by 2020 under the Global Warming Solutions Act of 2006 (AB32). It outlines a cap-and-trade program scheduled for January 2012, alongside 'early action' measures such as the Low Carbon Fuel Standard and landfill methane capture. The briefing also highlights California's leadership in the Western Climate Initiative and the political support for these measures following the defeat of Proposition 23 in November 2010.

The York Green Neighbourhood Challenge was a three-phase initiative conducted between May 2009 and September 2010 in the City of York. The project aimed to reduce household carbon emissions, raise awareness of low-carbon lifestyles, and foster community cohesion. By profiling neighbourhoods based on carbon footprints, environmental attitudes, and infrastructure, the project targeted 'high potential' areas—specifically South Bank Central and Holgate East—and recruited six teams (including neighbourhood, school, and church groups). Participants received personalised carbon footprint assessments and pledged pro-environmental actions over a six-month period, supported by mentors and external experts. The evaluation found that 49 participants achieved an average carbon footprint reduction of 2.0 tonnes of CO2e per year, representing an 11.3% decrease. The most significant reductions occurred in shopping and housing, while transport reductions were not statistically significant. The total projected emission reduction was 98 tonnes of CO2e per year, at a cost of £472.57 per tonne. The report concludes by proposing a model for community engagement that emphasizes quality of life, targets responsive audiences, and utilizes existing community networks.

The paper analyzes the drivers of per capita CO2 emissions across U.S. states, noting a wide range from 76.5 mT in Alaska to 12.2 mT in Vermont. It identifies that high transportation emissions are linked to sparse populations, low gasoline prices, and limited public transit. High residential heating emissions are associated with cold climates, high average incomes, and the use of oil for heating. Additionally, high residential electricity emissions are driven by coal-based power generation, hot and humid climates, and low electricity prices. The authors highlight gasoline prices, electricity prices, and public transportation use as key policy variables.

The document outlines how transitioning away from fossil fuels reduces health costs via three primary channels: mitigating air and water pollution, reducing obesity through active transportation, and lowering climate change risks. It provides specific 2005 cost estimates for health damages from coal-fired plants ($62 billion), natural gas plants ($740 million), and vehicles ($56 billion). The text emphasizes that obesity currently represents a larger health cost burden in the United States than air quality impacts and suggests that energy policies should be evaluated based on total costs and benefits per unit of energy or distance.

The report outlines the results of expert dialogues held between 2009 and 2010 focused on North American energy and climate collaboration. It highlights a period of significant political uncertainty, particularly regarding U.S. federal legislation, and argues that Canada and Mexico must engage actively in policy discussions to avoid becoming "policy takers." Key areas for cooperation include carbon pricing, renewable energy investment, carbon capture and storage (CCS), and transportation fuel standards. The document emphasizes that while a unified "North American Bubble" for emissions targets is unlikely, pragmatic, sector-specific coordination and the harmonization of technical standards offer viable paths forward in the absence of a continental regulatory framework.

The Union of Concerned Scientists argues that current U.S. biofuel policies are costly and ineffective, primarily supporting mature corn ethanol industries while cellulosic biofuels remain stalled. The report proposes 'The Billion Gallon Challenge' to provide investment tax credits and loan guarantees for 10 to 20 new commercial-scale cellulosic facilities. Additionally, it suggests replacing existing tax credits with a 'Biofuels Performance Tax Credit' that rewards fuels based on their ability to replace oil and reduce global warming emissions. Together, these measures could reduce global warming emissions by nearly 100 million metric tons annually by 2022.

The Union of Concerned Scientists argues that cellulosic biofuel production in the U.S. is failing to meet government mandates due to a lack of investment capital and high risks for first-movers. To address this, they propose the 'Billion Gallon Challenge,' which would provide a 30-percent investment tax credit and loan guarantees to establish 10 to 20 commercial-scale facilities with a combined capacity of 1 billion gallons per year. This initiative aims to bridge the gap between current Energy Information Administration forecasts and the Renewable Fuel Standard's 2022 goal of 16 billion gallons, potentially saving 7 billion gallons of gasoline and reducing global warming emissions by 45 million metric tons annually by 2022.

The report documents that commuters in cars, buses, trains, and ferries are routinely exposed to high levels of diesel exhaust, with ultrafine particles (UFPs) serving as the most sensitive marker of fresh diesel emissions. Findings indicate that diesel soot dominates roadway particulate matter and that in-vehicle exposures are significantly higher than ambient outdoor air, particularly in 'pull' trains and highway tunnels. The study concludes that diesel particulate filters (DPFs) are highly effective at eliminating the soot plume behind vehicles, significantly improving air quality for following commuters and pedestrians.

The Resources and Energy Analysis Programme (REAP) is a software tool developed by the Stockholm Environment Institute (SEI) that uses an environmentally extended input-output model to track greenhouse gas emissions, air pollutants, and ecological footprints based on consumption rather than just production. By distinguishing between domestic and imported goods across 178 sectors, REAP allows users to create quantifiable scenarios based on the IPAT formula (Population, Affluence, and Technology) to test policy interventions. The tool has been applied to various UK sectors, including the NHS and tourism, and used in regional planning, such as housing scenarios in the Tees Valley. SEI is expanding the tool's application to EU-27 members, Sweden, and the Basque Country.

The paper evaluates the feasibility of implementing a Personal Carbon Trading (PCT) scheme in Sweden, comparing it to existing UK-based models and current Swedish climate policies. It concludes that a standard PCT scheme would not be an efficient approach for reducing emissions in Sweden's housing and transport sectors due to high administrative costs and the effectiveness of existing policies. However, it suggests that PCT-like concepts could be explored to address emissions embedded in global supply chains.

The document outlines how climate action benefits U.S. national security through three primary channels: reducing reliance on foreign oil, transitioning to a distributed energy system to lower infrastructure vulnerability, and preventing climate-driven global instability. It specifically highlights that reducing petroleum consumption by 6 million barrels per day by 2030 could match current OPEC imports, and warns that climate change acts as a "threat multiplier" that could increase the burden on the U.S. military through humanitarian missions and threats to strategic bases like Diego Garcia.

The report projects that Minnesota will face significantly hotter summers, increased flooding, and agricultural threats if current emissions trends continue. Under a high-emissions scenario, the state could see a 12°F increase in average summer temperatures by the end of the century, with Minneapolis-St. Paul experiencing nearly 70 days over 90°F per summer. These changes are expected to increase heat-related mortality, worsen air quality through higher ozone and particulate levels, and disrupt farming via heat stress and pest expansion. The document advocates for a transition to renewable energy, increased energy efficiency, and a federal cap-and-trade program to mitigate these risks.

The report projects that Missouri will face significantly hotter summers, increased flooding, and agricultural disruptions if heat-trapping emissions continue to rise. It highlights severe risks for St. Louis, including extreme heat waves and deteriorating air quality, and suggests a combination of state-level energy efficiency and federal climate legislation to mitigate these effects.

The paper argues that artisanal mining in Kalima is more beneficial to the local population than industrial mining was, providing higher employment, better income, and more democratic working conditions. While it notes a decline in local farming and a collapse of social services previously provided by industrial companies, it suggests artisanal mining is more environmentally benign than industrial methods, despite the high carbon footprint of flying ore out of the region. The author also analyzes the DRC's punitive export tax regime, which encourages smuggling into Rwanda, and argues that the lack of conflict in Maniema's mining sector contrasts with the resource-fueled violence in the Kivu regions.

The Union of Concerned Scientists argues that while biofuels can reduce transportation emissions, their actual impact varies widely based on feedstock and production methods. The report advocates for 'well-to-wheel' life cycle analysis to prevent the adoption of high-carbon alternatives like liquid coal and to promote advanced cellulosic biofuels. It specifically highlights California's Low Carbon Fuel Standard as a model for federal policy to create market incentives for the lowest-carbon fuels while maintaining environmental safeguards.

The Clean Air Task Force (CATF) conducted monitoring in Austin, Boston, New York City, and Columbus to assess diesel exhaust exposure during commutes. The study found that commuters in cars, buses, and trains are exposed to diesel particle levels significantly higher than ambient outdoor air, with the highest concentrations occurring in the presence of heavy truck traffic or when trains are pulled by locomotives. The report highlights that while commuting accounts for only about 6% of a person's day, it may contribute over half of their daily exposure to ultrafine particles. To mitigate these risks, the report recommends retrofitting existing diesel engines with diesel particulate filters (DPFs), which can reduce particle emissions by up to 90%.

AESR and SGR argue for more aggressive domestic emission reductions in the UK, specifically targeting the transport sector through higher fuel duties and a renewable transport fuels obligation. They advocate for redirecting military R&D funding toward sustainable energy, implementing mandatory energy-efficiency ratings for home sales, and expanding the Emissions Trading Scheme to non-energy intensive sectors. The response emphasizes the need for a highly trained workforce for micro-CHP installation and warns against ocean-based carbon storage due to environmental risks.