The California Air Resources Board (CARB) Executive Officer has certified the 2020 annual update to the carbon intensities (CI) of the lookup table pathways for a) California Average Grid Electricity Used as a Transportation Fuel in California and b) Electricity Supplied under the Smart Charging or Smart Electrolysis Provision. The... Read more →

The results of a new analysis by the International Council on Clean Transportation (ICCT) show that, when combined with a trend toward higher methane leakage and combustion slip, there is no climate benefit from using liquefied natural gas (LNG) as a marine fuel—regardless of the engine technology. LNG is becoming... Read more →

Although hydropower is broadly considered to be much more environmentally friendly than electricity generated from fossil fuels (e.g., earlier post), a new study by a team at Environmental Defense Fund finds that the climate impact of hydropower facilities varies widely throughout the world and over time, with some facilities emitting... Read more →

The lifecycle CO2 balance of the Mercedes-Benz EQC 400 4MATIC is as low as 17.1 tonnes of CO2 when the electricity is produced by hydropower; 16.4 tonnes of that is from the production of the vehicle itself. On the average EU electricity mix, the lifecycle CO2 balance almost doubles to... Read more →

A study by Mark Z. Jacobson, professor of civil and environmental engineering at Stanford University, suggests that carbon capture technologies are inefficient and increase air pollution. His open-access paper is published in the journal Energy and Environmental Science. All sorts of scenarios have been developed under the assumption that carbon... Read more →

A team from Pacific Northwest National Laboratory (PNNL) and Idaho National Laboratory has evaluated the process economics and greenhouse gas (GHG) emissions for the conversion of 11 biomass feedstocks to produce transportation fuels via fast pyrolysis and then pyrolysis oil upgrading via hydrodeoxygenation. An open-access paper on their work appears... Read more →

Audi has set the goal of successively reducing vehicle-specific CO2 emissions by 30% by 2025 compared with reference year 2015 and over the entire product lifecycle. In the long term, Audi is pursuing the vision of CO2-neutral mobility and aims to be climate-neutral throughout the company on balance by 2050.... Read more →

As electric vehicles start to become mainstream and the contribution of renewable energy to the electricity grid grows, by 2030 more than 70% of CO2 emissions from typical new road vehicles could arise during the production—rather than use—phase of the life cycle of a typical vehicle. Consequently, the UK’s Low... Read more →

Researchers at MIT and the Ford Motor Company have found that depending on the location, lightweight conventional vehicles could have a lower lifecycle greenhouse gas impact than electric vehicles, at least in the near term. Their paper is published in the ACS journal Environmental Science & Technology. Assessments of GHG... Read more →

A new study from North Carolina State University finds that while shared e-scooters may be greener than most cars, they can be less green than several other options, including, in some cases, buses. Their open-access paper is published in the journal E.nvironmental Research Letters Using life cycle assessment, the researchers... Read more →

A life-cycle assessment of emissions from domestic and imported liquefied natural gas (LNG), and heavy-fuel oil (HFO) for marine shipping by a team from the University of British Columbia has found that only high-pressure dual-fuel (HPDF) engines robustly reduce well-to-wake GHG emissions by 10% compared with their HFO-fueled counterparts. Low... Read more →

For the same vehicle models with different powertrains, the carbon footprint of the battery-powered E variants is already better than those of the corresponding vehicles with internal combustion engines, according to a certified life cycle assessment (LCA) of the Volkswagen Golf, which compares the CO2 emissions of the different vehicle... Read more →

According to a new study published by the ifo Institue Center for Economic Studies (CESifo) in Germany, EVs will barely help cut CO2 emissions in the country over the coming years, as the introduction of electric vehicles does not necessarily lead to a reduction in CO2 emissions from road traffic... Read more →

A lifecycle study by consultancy thinkstep, commissioned by SEA\LNG and SGMF, has found that greenhouse gas (GHG) reductions of up to 21% are achievable now from LNG as a marine fuel, compared with current oil-based marine fuels, over the entire life-cycle from Well-to-Wake (WtW). The study also confirms that emissions... Read more →

The fuel cell plug-in hybrid Mercedes-Benz GLC F-CELL (combined hydrogen consumption: 0.34 kg/100 km, combined CO₂ emissions: 0 g/km, combined power consumption: 13.7 kWh/100 km) has successfully passed its 360° environmental check. The results have been verified by the TÜV Süd technical service. The environmental check is based on an... Read more →

A new study released by the US Department of Agriculture (USDA) finds greenhouse gas emissions from corn-based ethanol are about 39% lower than gasoline. The study also states that when ethanol is refined at natural gas-powered refineries, the greenhouse gas emissions are even lower—around 43% below gasoline. The study, led... Read more →

The production of an electric vehicle currently generates significantly more CO2 than that of cars with a combustion engine—around 150% on average. From a lifecycle view, this additional carbon burden is offset compared to the combustion engine vehicle during the use phase, as EVs rack up zero-emission miles that eventually... Read more →

A study by a team from the University of Toronto and Ford R&D in Dearborn has found that lightweighting is an effective solution that could provide important near-term GHG emission reductions especially during the next 10–20 years when the fleet is dominated by conventional powertrain vehicles. a) Annual US. light-duty... Read more →

CR&R Incorporated / California Renewable Power LLC (CR&R) has submitted a California LCFS Tier 2 application for its biomethane from anaerobic digestion of green waste to CNG pathway, with a requested carbon intensity (CI) of 0.34 gCO2e/MJ. The CR&R facility produces biomethane from an organic waste anaerobic digester (AD) facility... Read more →

Volkswagen has been testing the newly developed R33 BlueDiesel fuel blend at its in-house filling station in Wolfsburg since January 2018. The fuel, jointly developed by Volkswagen, the Coburg University and other project partners, contains up to 33% renewable components based exclusively on residual and waste materials and enables CO2... Read more →

Battery electric cars emit less greenhouse gases and air pollutants over their entire life cycle than petrol and diesel cars, according to a European Environment Agency (EEA) report. Promoting renewable energy and circular economy—including the shared use of vehicles and product design that supports reuse and recycling—will help maximize the... Read more →

A team at Imperial College London has examined the relative costs of carbon mitigation from a lifecycle perspective for 12 different hydrogen production techniques using fossil fuels, nuclear energy and renewable sources. An open-access paper on their work is published the RSC journal Energy & Environmental Science. As with all... Read more →

Argonne National Laboratory’s Systems Assessment Group announced the 2018 release of the suite of GREET models and associated documentation. The GREET model is a life-cycle analysis (LCA) tool, structured to systematically examine energy and environmental effects of a wide variety of transportation fuels and vehicle technologies in major transportation sectors... Read more →

All large-scale energy systems have environmental impacts, and the ability to compare the impacts of renewable energy sources is an important step in planning a future without coal or gas power. Extracting energy from the wind causes climatic impacts that are small compared to current projections of 21st century warming,... Read more →

A new Life Cycle Assessment (LCA) study by Ricardo for the Low Carbon Vehicle Partnership (LowCVP) across a broad range of vehicle sectors finds that the relative contribution of each vehicle life cycle stage is highly dependent on the vehicle type and powertrain technology as well as what assumptions are... Read more →

A “well-to-wheel” life cycle assessment (LCA) by a team from synthetic fuels producer Greyrock (earlier post), and the National Renewable Energy Laboratory (NREL) has determined the potential reduction of greenhouse gases and criteria pollutant emissions from the use of synthetic fuels directly converted from flare gas. The results of this... Read more →

Numerous studies have tackled the future environmental impact of battery-electric vehicles; the resulting assessments are highly uncertain. Now, a team of researchers at the Paul Scherrer Institut in Switzerland, with colleagues at Leiden University (Netherlands) and PBL Netherlands Environmental Assessment Agency have used Monte Carlo and global sensitivity analysis to... Read more →

SABIC, a global leader in the chemical industry, released the results of a recent lifecycle assessment of passenger car side doors using hybrid material solutions including laminates made with its continuous fiber-reinforced thermoplastic composite (CFRTC), the UDMAX GPP 45-70 tape. The material system aims to help improve compliance with stringent... Read more →

Greenhouse gas emissions (GHGE) from the Information and Communication Industry (ICT) could grow from roughly 1–1.6% in 2007 to exceed 14% of the 2016-level worldwide GHGE by 2040, accounting for more than half of the current relative contribution of the whole transportation sector, according to a new study from McMaster... Read more →

Researchers at the University of Michigan and Ford Motor Company have found that using a Level 4 connected and automated vehicle (CAV) subsystem could increase vehicle primary energy use and GHG emissions by 3–20% due to increases in power consumption, weight, drag, and data transmission. However, when potential operational effects... Read more →

The life-cycle water consumption of fuel cell electric vehicles using hydrogen produced from natural gas with steam methane reforming is almost 50% less than the life-cycle water consumption of conventional internal combustion engine vehicles using gasoline, according to a study by researchers at Argonne National Laboratory (ANL). If the hydrogen... Read more →

Analysts at the International Council on Clean Transportation (ICCT) have reviewed recent research into the greenhouse gas emissions from the manufacturing of lithium-ion batteries for electric vehicles. The ICCT analysis is in the overall context of life-cycle emissions of electric cars as compared to conventional internal combustion vehicles in Europe.... Read more →

A cradle-to-grave (C2G) assessment of greenhouse gas (GHG) emissions and costs for current (2015) and future (2025–2030) light-duty vehicles by a team from US DOE and national laboratories, major automakers, EPRI and Chevron has found that currently, hybrid and plug-in hybrid petroleum-fueled vehicles provide the most attractive cost in terms... Read more →

The Steel Recycling Institute (SRI), a business unit of the American Iron and Steel Institute, released a peer-reviewed study that examines the overall environmental impact of vehicle lightweighting using advanced high-strength steel (AHSS) compared with aluminum. The study, “Life Cycle Greenhouse Gas and Energy Study of Automotive Lightweighting,” found that... Read more →

Replacing fossil fuels with Neste’s renewable fuels reduced global climate emissions altogether by a 8.3 million metric tons—8.3 billion kilograms—in 2017, according to calculations made by the company. The figure equals removal of 3 million passenger cars from the roads for a full year—more than the amount of cars in... Read more →

Life-cycle analysis specialist EVEA has estimated that fully renewable ETBE produced by the Global Bioenergies’ IBN-One plant would enable 69% reduction in greenhouse gas emissions compared to fossil gasoline. This figure was calculated for the current design planned for the IBN-One plant using a greenhouse gases emissions calculator based on... Read more →

In an open-access paper published in Scientific Reports, a team from Fraunhofer ISI and KIT (Karlsruhe Institute of Technology) has presented the first systematic overview of empirical findings on the electrification of vehicle mileage based on on actual PHEV (plug-in hybrid) and BEV (battery-electric vehicle) usage for the US and... Read more →

A team at the University of Michigan Transportation Research Institute (UMTRI) study has assessed the relative amounts of greenhouse-gas emissions from driving a battery-electric vehicle (BEV) compared with greenhouse-gas emissions from driving a traditional gasoline-powered vehicle in different countries of the world. Indirect emissions from BEVs depend on the mix... Read more →

Vastly expanding sugarcane production in Brazil for conversion to ethanol could reduce current global CO2 emissions by as much as 5.6%, according to a new study by an international team led by researchers from the University of Illinois. This would be a massive undertaking, involving the conversion of hundreds of... Read more →

Researchers from Carnegie Mellon University and the University of Pittsburgh have found that the air pollution and greenhouse gas costs of shipping crude by rail are nearly twice as large as those for oil pipelines. Further, their estimates of air pollution and greenhouse gas costs are much larger than estimates... Read more →

Researchers at Argonne National Laboratory have released updates to two key tools for the analysis of advanced transportation technologies: GREET, used to assess greenhouse gases, regulated emissions and energy use in transportation; and AFLEET, used to calculate and compare the costs and environmental benefits of a broad range of alternative... Read more →

A new analysis by the NGO Transport & Environment (T&E) concludes that diesel cars emit more CO2 than equivalent cars on a full lifecycle basis—i.e., accounting for the emissions generated during production of the vehicle and the fuel. According to the T&E analysis, an average diesel car produces emits 3.65... Read more →

The benefit to the climate of using biofuels as a substitute for fossil fuels has been sharply contested for years; much of the disagreement is based on the assumptions underlying the carbon accounting in the lifecycle analysis. The argument essentially boils down to whether or not biofuels are inherently carbon... Read more →

A new study finds that as some of the world’s largest oilfields age, the energy required to keep them operating can rise dramatically even as the amount of petroleum they produce drops. Failing to take the changing energy requirements of oilfields into account can cause oilfield managers or policymakers to... Read more →

Cellulosic biofuels could provide an environmentally sustainable way of meeting energy needs—but with a few important caveats, according to a new review of research by a team from the US Department of Energy-funded Great Lakes Bioenergy Research Center (GLBRC). Their paper is published in the journal Science. Although not yet... Read more →

A new study by researchers at the University of Colorado at Boulder projects the emission impacts of the widespread introduction of inexpensive and efficient electric vehicles into the US light duty vehicle (LDV) sector. The work is reported in a paper in the ACS journal Environmental Science & Technology. Under... Read more →

General Motors earned a 2017 EPA ENERGY STAR Partner of the Year — Sustained Excellence award for continued leadership in protecting the environment through superior energy efficiency. GM’s commitment to reducing energy intensity saved $73 million in energy costs last year and avoided 388,000 metric tons of carbon emissions, equivalent... Read more →

A new study by a team at the International Council on Clean Transportation (ICCT) has concluded that the large-scale deployment of alternative jet fuels (AJFs) and the ability of the aviation sector to mitigate greenhouse gas (GHG) emissions through their use will be capped by a number of factors: the... Read more →

The Mercedes-Benz E 350 e plug-in hybrid (earlier post) has successfully completed the TÜV validation audit and received the Environmental Certificate. This award is based on a Life Cycle Assessment (LCA) in which the independent experts at TÜV Süd (the German Technical Inspection Authority) comprehensively assess the environmental impact of... Read more →

A new lifecycle analysis of corn ethanol released by the US Department of Agriculture (USDA) finds that GHG emissions associated with corn-based ethanol in the United States are about 43% lower than gasoline when measured on an energy-equivalent basis. Unlike other studies of GHG benefits, which relied on forecasts of... Read more →