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The report finds that while the Chilean light-duty vehicle fleet achieved a record-high average fuel economy of 16.9 km/lge in 2025, only 45% of importers complied with the required standard. Compliance was largely driven by a threefold multiplier for plug-in vehicles, as actual sales-weighted fuel economy without the incentive was lower than the 18.8 km/lge target. Despite a 200% increase in available battery electric vehicle (BEV) models and a 26% price drop for top-selling BEVs, the BEV market share remained stagnant at 2.2% between 2024 and 2025. The report notes a 3% reduction in CO2 emissions from vehicles sold since 2023 and an estimated saving of 9.1 million litres of gasoline.

The study developed a detailed inventory model for eleven pollutants in Kenya's road transport sector, which accounts for 93% of all freight and passenger traffic. Projections indicate that emissions could increase exponentially by 2050 under a business-as-usual scenario. The authors identify improving fuel economy, vehicle standards, fuel sources, and public transport investment as the most effective strategies for improving air quality and meeting climate goals.

The Union of Concerned Scientists (UCS) finds that the average EV in the US produces global warming emissions equivalent to a gasoline vehicle achieving 88 mpg, making it cleaner than any new gasoline car available. This advantage is driven by the decreasing share of coal in the US electricity grid and improvements in EV efficiency, notably from the Tesla Model 3. The report highlights that 94% of the US population now lives in regions where an EV is cleaner than a 50 mpg gasoline car, compared to less than 50% in 2012.

The report analyzes the climate impact of transportation network companies (TNCs) in seven major U.S. cities. It finds that non-pooled ride-hailing trips emit 47% more than private vehicle trips of the same length, largely due to 'deadheading' (driving without passengers). When accounting for the modes of transport that ride-hailing displaces—including mass transit, walking, and biking—typical ride-hailing trips are approximately 69% more polluting than the trips they replace. The analysis suggests that a transition to electric vehicles and an increase in pooling rates to 50% could reduce these emissions by 52% relative to displaced trips.

The Trump Administration's Safe Affordable Fuel-Efficient (SAFE) Vehicles Rule loosens carbon emissions standards for passenger cars and light trucks for 2021-2026 and rolls back the Corporate Average Fuel Economy (CAFE) program. The author contends that these rules are detrimental to human health and the climate, and will likely fail to stop the global transition to a clean economy as international markets for combustion vehicles shrink and countries like Britain, France, Norway, India, and China move toward banning new gasoline and diesel vehicles by 2030 or 2040.

The 2018 Automaker Rankings by the Union of Concerned Scientists analyzes the emissions of new vehicles sold in the U.S., finding that while average emissions have reached record lows, the pace of reduction is slowing. The report identifies Honda as the top-performing full-line manufacturer and Tesla as the overall leader, while noting that the 'Detroit Three' (Ford, General Motors, and Fiat Chrysler) continue to lag behind the industry average. The analysis highlights a conflict between industry lobbying for weaker standards and the available technological capacity to further reduce fuel use and emissions.

The 2018 Automaker Rankings by the Union of Concerned Scientists finds that while average emissions from new vehicles have reached record lows, the pace of reduction is slowing due to a market shift toward SUVs and inconsistent investment in efficiency technologies. Honda is the top-performing full-line manufacturer, while Tesla leads overall with an all-electric fleet. The 'Detroit Three' (Ford, GM, and Fiat Chrysler) consistently underperform compared to the industry average. The report details the deployment of fuel-saving technologies—such as gasoline direct injection, cylinder deactivation, and electrification—and argues that strong federal standards are essential to prevent manufacturers from prioritizing performance over emissions reductions.

The document presents an economic analysis by Synapse Energy Economics, Inc. showing that clean car standards drive job creation and GDP growth through automotive industry investments and increased consumer spending. It estimates that by 2035, these standards could add over 250,000 jobs and $16 billion to the GDP, while saving consumers $90 billion in annual fuel costs. The text also critiques a previous Indiana University study, noting that subsequent corrections to that study shifted its findings from a net GDP loss to a net gain.

The Union of Concerned Scientists reports that since the 1950s, US automakers have consistently fought against fuel economy, emissions, and safety standards using 'scare tactics' and claims of technical infeasibility, despite later meeting or exceeding those same standards. While the industry collaborated with the federal government in 2009 to establish flexible standards that have since saved drivers nearly $50 billion, the report claims that industry trade groups are currently attempting to weaken these rules. The document calls for automakers to cease spreading disinformation and support strong, technology-forcing standards.

The report documents a 70-year history of 'intransigence' by US automakers, who repeatedly claimed that environmental and safety mandates were technically impossible or economically ruinous, only to implement the technologies once mandated. It details specific battles over the Clean Air Act, CAFE standards, and vehicle safety features like airbags, concluding that regulation has historically acted as a catalyst for innovation rather than a destroyer of the industry.

The document reports significant job growth in the U.S. clean energy sector as of early 2016. It highlights that solar and wind industries are expanding rapidly, with solar jobs growing 17 times faster than the overall economy and wind-turbine technicians projected as the fastest-growing occupation. Energy efficiency employs the largest volume of workers at 2.2 million. Geographically, Texas leads in wind jobs, while California leads in solar and energy efficiency jobs.

The report analyzes the fragmented state of Chinese logistics, where low barriers to entry and poor regulatory enforcement lead to overloading and low truck utilization. It argues that improving efficiency could save the Chinese economy up to RMB 1T annually and prevent freight emissions from growing from 4% to 16% of total CO2 emissions. The document proposes five key solutions: logistics information platforms, best-practice sharing mechanisms, equipment standardization, urban logistics master planning, and tax/toll reform.

The We Mean Business Coalition acknowledges the US pledge to reduce greenhouse gas pollution by 26-28 percent below 2005 levels by 2025 as a positive step but argues it is insufficient to prevent 3.5 degrees Celsius of warming. The coalition calls for a detailed national decarbonization pathway targeting 80% or more reductions by 2050, a five-year cycle for strengthening targets, and the scale-up of public finance via the Green Climate Fund to leverage private sector capital.

The report examines the environmental and economic impacts of heavy-duty truck fuel efficiency in the U.S., arguing that standards increasing efficiency by 40% by 2025 would save billions in costs and reduce millions of metric tons of emissions.

Georgia has emerged as a leading U.S. market for electric vehicles, driven by state tax credits for vehicles and charging infrastructure. In 2014, EV drivers in Georgia saved an average of over $850 in fuel costs, contributing to a total state saving of $10 million and a reduction of over 22,000 tons of climate change emissions. The document highlights that EVs offer lower maintenance costs and lower global warming emissions than conventional vehicles, with benefits increasing as Georgia's electricity grid incorporates more renewable energy. To sustain growth, the report emphasizes the need for ongoing policy support, consumer education, and public-private partnerships.

The 2014 Automaker Rankings by the Union of Concerned Scientists evaluates the environmental performance of the eight best-selling automakers in the U.S. for model year 2013. For the first time since the series began in 2000, all eight analyzed companies reduced their average global warming emissions compared to 1998 levels. Hyundai-Kia is ranked as the 'Greenest Automaker,' unseating Honda, due to fleet-wide improvements in fuel efficiency through engine downsizing and turbocharging. Conversely, Chrysler is identified as the worst performer, earning the 'dirtiest tailpipe' distinction. The report attributes overall industry progress to more stringent federal fuel economy and tailpipe emissions standards, noting an 87 percent drop in smog-forming tailpipe emissions from the U.S. fleet since 1998.

The research paper evaluates strategies to decarbonise urban transportation, focusing on modal shifts, fuel switching, and electricity decarbonisation. Using a Spanish urban area as a model, it finds that aggressive measures—including a 50% reduction in car demand, improved fuel economy, and a shift to nuclear or CCS-equipped power—are necessary to significantly lower emissions and health burdens from particulate matter.

The document highlights the economic and environmental advantages of electric vehicles (EVs) over gasoline-powered cars, noting that fuel savings can offset higher purchase prices and that EVs produce fewer global warming emissions regardless of the electricity grid's composition. It positions EVs as a central pillar of the 'Half the Oil' plan to reduce U.S. oil dependency through efficiency, biofuels, and advanced vehicle technology.

The document advocates for the Obama administration's proposed 2017-2025 vehicle standards to increase average fuel efficiency to approximately 50 mpg, arguing that fuel savings will outweigh the higher purchase price of cleaner vehicles. It dismisses expanded domestic drilling as an ineffective solution for reducing gas prices.

The Union of Concerned Scientists' 2010 rankings identify Honda as the greenest automaker for model year 2008, followed closely by Toyota and Hyundai. The report highlights a significant performance gap between these leaders and the 'Detroit Three' (Ford, General Motors, and Chrysler), who consistently rank at the bottom due to lower fuel economy and higher emissions. While government standards have improved smog-forming emissions across the industry, global warming emissions remain a key differentiator. The analysis also examines the impact of hybrid and flexible-fuel vehicles, noting that while Toyota's Prius significantly improves its overall score, flexible-fuel vehicles often serve as a loophole for automakers to meet fuel economy requirements without providing real-world environmental benefits.