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Study finds rising temperatures increase risk of unhealthy ozone levels absent sharp cuts in precursors

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Ozone pollution across the continental United States will become far more difficult to keep in check as temperatures rise, according to new work led by the National Center for Atmospheric Research (NCAR). Preliminary global mean CO 2 concentrations in February 2014 were 398.06 Ozone formation. Scenario A2 and RCP 8.5.

Ozone 199
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HEI: 95%+ of world’s population live in areas of unhealthy air

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Seven billion people, more than 95% of the world’s population, lived in areas exceeding the WHO Guideline for healthy air in 2016, according to a new global study. Comparison of 2016 annual average PM 2.5 State of Global Air 2018. Population-weighted seasonal average ozone concentrations in 2016. State of Global Air 2018.

Pollution 218
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Renault makes public its lifecycle study of Fluence ICE vs Fluence EV

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Renault’s comparison of the carbon footprint of EV and ICE vehicles over production, operation and end of life. The publication gives the opportunity for an “apples-to-apples” comparison between the environmental impacts of the two types of powertrains: same manufacturer, same model, same boundary conditions. Click to enlarge.

Li-ion 364
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NOAA greenhouse gas index continues climbing; 1.29 in 2010

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the combined heating effect of long-lived greenhouse gases added to the atmosphere by human activities has increased by 29% since 1990, the index year used as a baseline for comparison. It also includes several chemicals known to deplete Earth’s protective ozone layer, which are also active as greenhouse gases. in 2010—i.e.,

2010 199
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NASA GISS Study Finds That Methane Has an Elevated Warming Effect Due to Interactions With Aerosols

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The 100-year global warming potentials (GWPs) for methane, CO, and NO x (per Tg N) as given in the AR4 and in this study when including no aerosol response; the direct radiative effect of aerosol responses; and the direct+indirect radiative effects of aerosol responses. Source: Shindell at al. Click to enlarge. —Drew Shindell.

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MIT study finds including non-CO2 emissions from synthetic aviation fuel in lifecycle analysis of climate impact can lead to decrease in relative environmental merit; need for a holistic analysis framework

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In the months following a pulse of NO x in the upper atmosphere, ozone production is stimulated causing a short-term warming. The corresponding reduction in CH 4 , which is an important ozone precursor, leads to a long-term reduction in ozone. —Stratton et al. Many other factors have less quantifiable impacts.

MIT 273
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Abt life-cycle analysis of different Li-ion chemistries for PHEVs and EVs identifies opportunities for improving environmental profile of batteries

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ADP = abiotic depletion potential; AP = acidification potential; EcoTP = ecological toxicity potential; EP = eutrophication potential; GWP = global warming potential; HTP = human toxicity potential; OCH = occupational cancer hazard; ODP = ozone depletion potential; OnCH = occupational non-cancer hazard; POP = photochemical oxidation potential.

Li-ion 210