Search Climate Insights Directory

The Rocky Mountain Institute (RMI) outlines immediate strategies to lower U.S. crude oil demand, arguing that a 5% to 9% reduction would remove 1.0 to 1.8 million barrels per day from the global market. Proposed measures include reducing speed limits for non-Class 8 vehicles to 60 MPH, increasing the federal Gross Vehicle Weight Rating (GVWR) for trucks to 110,000 lbs, and mandating Auxiliary Power Units (APUs) for new Class 8 tractors. RMI suggests these actions, combined with increased biofuel procurement and the adoption of 'total-flex' vehicle technology, would restore global excess capacity to 2.5 to 3.8 million barrels per day, thereby reducing price volatility.

The report outlines legislative strategies for U.S. states to increase vehicle efficiency, categorizing them into short-term options—such as HOV lane access for Alternative Fuel Vehicles (AFVs) and Hybrid Electric Vehicles (HEVs), state procurement mandates, and tire labeling—and long-term options, including tax incentives, 'pay-at-the-pump' insurance, and feebate programs. It argues that state action is necessary due to the economic burden of high oil prices, security risks associated with oil dependence, and environmental impacts like carbon dioxide emissions.

Amory B. Lovins, CEO of RMI, submits comments to NHTSA challenging the technical basis of its proposed rulemaking on automobile fuel economy standards. He argues that NHTSA incorrectly relies on retrospective correlations between vehicle weight and safety, which fail to account for modern materials like advanced polymer composites and high-strength steels. Lovins asserts that these materials can create vehicles that are simultaneously large, lightweight, and safe, thereby eliminating the perceived tradeoff between fuel economy and crashworthiness. He recommends that CAFE standards be performance-based, technology-forcing, and based on size metrics rather than mass to avoid incentivizing a 'mass arms race' and to maintain the global competitiveness of U.S. automakers.

The report argues that hybrid electric vehicles (HEVs) can bridge the gap between current conventional vehicle technology and the long-term adoption of hydrogen fuel cells. It categorizes hybrids into mild, full, and plug-in types based on technological steps like regenerative braking and electric-only drive. Modeling suggests a passenger fleet using advanced full hybrids could reach an average of 60 mpg, significantly reducing oil consumption and greenhouse gas emissions while remaining cost-effective for consumers over the vehicle's lifetime.

The report argues that the US can significantly reduce its oil consumption and environmental footprint by aggressively raising Corporate Average Fuel Economy (CAFE) standards. It proposes a path to 40 mpg by 2012 and 55 mpg by 2020 using evolutionary conventional technologies and hybrid electric vehicles. The analysis suggests these improvements would save consumers billions of dollars, create over 100,000 automobile industry jobs by 2020, and reduce greenhouse gas emissions by 888 million tons by 2020. Furthermore, the report contends that these fuel savings would far exceed the potential oil supply from the Arctic National Wildlife Refuge and that safety can be maintained or improved through better design and the reduction of weight disparity between light trucks and passenger cars.

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 proposes the 'Hypercar', an ultralight hybrid-electric vehicle that combines synthetic composite materials with hybrid propulsion to increase fuel efficiency by up to ten times compared to standard cars. It argues that the current 'Iron Age' approach of incremental steel-car refinements is obsolete and that the U.S. must transition to agile, low-capital manufacturing using moldable composites to maintain global competitiveness. The authors suggest that government mandates, such as California's ZEV requirements, and market-based 'feebates' can accelerate this transition, which would reduce oil dependency and environmental impact while fostering industrial renewal.

The paper proposes replacing conventional steel cars with 'supercars' that combine ultralight composite bodies, aerodynamic optimization, and hybrid-electric powertrains. The authors argue that such vehicles could achieve fuel efficiencies of <1.6 litres per 100 km in the near term and 0.8-1.0 litres per 100 km ultimately, without sacrificing safety or performance. This transition would require a shift from capital-intensive steel stamping to flexible, low-tooling composite moulding and a move toward direct-to-consumer marketing, potentially disrupting the existing industrial structure of the global auto industry.

The Clean Air Task Force argues that new infrastructure investments in the U.S. must prioritize clean diesel technology to reduce severe health risks and climate impacts. Diesel pollution is linked to 21,000 premature deaths annually in the U.S., and construction equipment accounts for over 37 percent of land-based particulate matter. The document proposes that combining diesel particulate filters with ultra-low sulfur diesel fuel can eliminate over 90 percent of particulate pollution, offering a high return on investment where every dollar spent avoids $12 in health damages.

The document details the distribution of Recovery Act funds for high-speed rail awards across the West, Midwest, Southeast, and Northeast regions of the United States. The West region received the highest allocation at $2,942,000,000, followed by the Midwest at $2,599,600,000, the Southeast at $1,870,000,000, and the Northeast at $485,000,000. Key projects include the California High-Speed Rail, the Tampa-Orlando Phase 1 HSR, and various track, signal, and station upgrades across multiple state corridors to increase train speeds and reliability.

The research paper by the Rocky Mountain Institute (RMI) challenges the perception that lighter vehicles are inherently less safe by virtually modeling an 'UltraLight' concept vehicle. Through crash simulations and comparisons with a 2007 Ford Edge, the study demonstrates that while an early-stage ultralight design may offer less protection to its own driver than a heavy vehicle, it is significantly less aggressive toward other road users. The findings suggest that a transition to a lightweight fleet could reduce overall injuries and that safety is primarily a function of design and materials rather than mass.

The paper proposes a 'hypercar' design based on the synergy of advanced-polymer-composite monocoques, ultralow drag, and hybrid-electric propulsion. It argues that this approach can increase fuel economy by 4–10 times compared to conventional cars, potentially reaching 60–120 km/l with fluid fuels or 250 km/l with fuel cells. The author emphasizes that the primary barriers to adoption are cultural rather than technical, as the industry relies on incremental steel-based design. Strategically, the shift to composites would lower fixed tooling costs, reduce reliance on oil, and enable a transition to distributed energy systems via fuel-cell vehicles acting as power plants.

The report argues that retrofittable efficiency technologies can offset fuel economy losses caused by 2002 and 2007 emissions regulations. It proposes two implementation scenarios for Canada's 294,000 Class-8 trucks: a 'full package' of all efficiency devices and a 'simple package' adopted by 50% of the fleet. The report emphasizes that government leadership, technical guidance, and financial incentives are essential to overcome industry obstacles and accelerate the adoption of these technologies.

The SHIFT Calculator estimates induced travel—the increase in vehicle miles traveled (VMT) following road capacity expansions—using empirical elasticities. It applies a 1.0 ratio for interstate highways and 0.75 for other freeways and arterials, predicting that a 1% increase in lane mileage leads to a corresponding increase in VMT over 5 to 10 years. The tool also calculates cumulative greenhouse gas emissions through 2050 based on two scenarios: a business-as-usual case and one aligned with the US Nationally Determined Commitment (NDC), which assumes 100% electrification of new passenger vehicles by 2035.

The report 'Jakarta Bukan untuk Semua Orang' critiques the current state of mobility in Jakarta, where traffic congestion and inadequate public transport create significant financial and health burdens for citizens. It argues that the classification of transportation as a 'non-basic mandatory affair' under Law No. 23 of 2014 leads to budget cuts and a lack of political will. The document advocates for a shift toward integrated, affordable public transport and electric buses, noting that electric bus operational costs in 2024 were approximately 9% lower than diesel buses.

The document outlines a framework for cities to transition to electric buses, emphasizing a phased approach from initial planning and pilot projects to mass adoption. It highlights the necessity of long-term infrastructure planning, procurement strategies, operator training, and battery end-of-life management to meet global climate objectives.

The report concludes that the United States cannot meet its oil and GHG targets through vehicle technology alone and must also reduce per capita vehicle miles traveled (VMT). It highlights a lack of evaluation for existing federal transportation programs and recommends that the U.S. Department of Transportation and Congress prioritize funding and planning for strategies that reduce VMT, such as public transit and pricing, to eliminate oil imports by 2030.

The document outlines findings from workshops held between August and October 2023 regarding the role of shared mobility in Latin American cities. Experts concluded that services like bike sharing and ride-hailing can support decarbonization if integrated with mass transit and supported by cross-sector collaboration, electric mobility strategies, data-driven policymaking, and formalized regulations.

The paper presents the City Climate Policy Assessment Framework, which evaluates city-level climate policies across seven sectors: community-wide initiatives, building policy, transportation policy, energy and water utilities, waste management, local government operations, and green finance. Based on an analysis of 12 cities in China and abroad, the study finds that while cities often excel in government operations and utilities, gaps persist in transportation, building policies, and community initiatives. It highlights that many cities set goals more ambitious than national standards and recommends improving data transparency and strengthening financial instruments like tax incentives and climate investment funds to address funding gaps.