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EPA initiates new review of the Ozone National Ambient Air Quality Standards

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The Environmental Protection Agency (EPA) announced a new review of the Ozone National Ambient Air Quality Standards (NAAQS). In October 2021, EPA announced a reconsideration of the previous Administration’s decision to retain the NAAQS for ozone. In many of the areas designated as not meeting the current 2015 standards, work remains.

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Fraunhofer IFF team designing hydrogen factory of the future

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Researchers at the Fraunhofer IFF in Germany are designing the distributed and modular production and distribution of green hydrogen for industry, business and transportation throughout the value chain—a hydrogen factory of the future. We additionally want to supply electricity, gas and heat to industry. © Fraunhofer IFF.

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Global study links daily exposure to ozone pollution to increased risk of death

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Daily exposure to ground level ozone in cities worldwide is associated with an increased risk of death, according to the largest study of its kind, published in an open-access paper in The BMJ. Ground level ozone is a highly reactive gas commonly found in urban and suburban environments, formed when pollutants react in sunlight.

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Texas study finds PHEV use could increase ozone at night, decrease ozone during the day

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A study by researchers at the University of Texas found that in general, use of plug-in hybrid electric vehicles (PHEVs) can lead to an increase in ozone during nighttime hours (due to decreased scavenging from both vehicles and EGU stacks) and a decrease in ozone during daytime hours.

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San José International deploys 10 Proterra electric buses in airport fleet

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The buses and charging systems were designed and manufactured locally by Proterra, based in Burlingame, Calif. Funded in part by a $5-million zero-emissions grant from the Federal Aviation Administration, the electric buses replace the aging compressed natural gas bus fleet that has been operating at SJC since 2008.

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MIT team proposes SCR emission control for hybrid aviation turbines; reducing NOx by 95%

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At cruising altitude, airplanes emit a steady stream of NO x into the atmosphere, where the chemicals can linger to produce ozone and fine particulates. The details of the design, including analyses of its potential fuel cost and health impacts, are published in an open-access paper in the journal Energy and Environmental Science.

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California introduces first-in-nation rules to reduce climate “super pollutants” from commercial refrigeration, air conditioning equipment

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HFCs are synthetic gases that are used in a variety of applications, but mainly to replace ozone-depleting substances in aerosols, foams, refrigeration and air-conditioning. California is required to reduce HFC emissions 40% below 2013 levels by 2030 under Senate Bill 1383.

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