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Global Carbon Project: Global carbon emissions growth slows, but hits record high

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Driven by rising natural gas and oil consumption, levels of CO 2 are expected to hit 37 billion metric tons this year, according to new estimates from the Global Carbon Project (GCP), an initiative led by Stanford University scientist Rob Jackson. Carbon dioxide emissions continue to grow despite emerging climate policies by G.P.

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Tsinghua University provincial-level lifecycle study finds fuel-cycle criteria pollutants of EVs in China could be up to 5x those of natural gas vehicles due to China’s coal-dominant power mix

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In regions where the share of coal-based electricity is relatively low, EVs can achieve substantial GHG reduction, the team reports in a paper in the ACS journal Environmental Science & Technology. It also assesses the strengths and weaknesses of EVs and CNGVs from a perspective of climate change and environmental impact.

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U. Mich study: natural-gas-based ICE, BEV and FCV all show promise for environmental benefits relative to conventional ICE

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Results of a lifecycle analysis by a team at the University of Michigan suggest that multiple types of natural gas-powered vehicles—i.e., Results of a lifecycle analysis by a team at the University of Michigan suggest that multiple types of natural gas-powered vehicles—i.e., Credit: ACS, Dai and Lastoskie. Click to enlarge.

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Study concludes that sugar cane-based biorefineries producing ethanol and electricity could power a global auto fleet of hybrids and EVs using only 4% of available cropland

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Number of cars (world and US), amount of gasoline consumed, amount of ethanol equivalent required for a neat ethanol fleet, ethanol and electricity to power hybrid fleet, and sugar cane area for hybrid fleet. l/100km) using gasoline as the fuel. Credit: ACS, Pacca and Moreira. Click to enlarge. km/liter (46 mpg US, or 5.1

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Study: even with high LDV electrification, low-carbon biofuels will be necessary to meet 80% GHG reduction target; “daunting” policy implications

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The same highly electrified scenarios, however, could not satisfy 80% GHG-reduction targets, even assuming 80% decarbonized electricity and no growth in travel demand. The researchers also considered intermediate (20% electric-powered miles) electrification—halfway between the high and low.

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Study on Greenhouse Gas Emissions from Global Cities Highlights Importance of Geophysical and Technical Factors

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Data for some components are available, e.g., for urban transportation or electricity. They calculated emissions for ten cities (or metropolitan regions), which vary in population from 432,000 to 9,519,000; comparisons are in per capita terms. Authors of the study included: Christopher Kennedy, University of Toronto.

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DeCicco: Transportation GHG reduction policy should focus upstream on fuel supply rather than downstream on choice of fuels in vehicles

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John DeCicco at the University of Michigan argues that to reduce transportation sector greenhouse gas emissions, the proper policy focus should be upstream in sectors that provide the fuel, rather than downstream on the choice of fuels in the automobile. In a new working paper, Prof. A parametric analysis by Barter et al.

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