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US EPA to Reconsider National Ozone Standards

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The US Environmental Protection Agency (EPA) will reconsider the 2008 primary and secondary ozone standards. In 2008, EPA established a new primary 8-hour standard for ozone of 0.075 parts per million (ppm), and a new secondary standard set at a form and level identical to the new primary standard. ppm standard, due to rounding.

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USC study finds particulate matter in air pollution affects thyroid development in fetuses

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Since the effort began in 1992, various USC researchers have documented how air pollution contributes to school absences, asthma, bronchitis and lost-lung function. They did not see the same increases associated with other air pollutants, such as ozone or nitrogen dioxide.

Pollution 301
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EPA Issues Proposed Endangerment Finding for Greenhouse Gases; Proposed Cause or Contribute Finding Identifies Motor Vehicles as Contributing Source

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Findings from a recent EPA study titled “Assessment of the Impacts of Global Change on Regional US Air Quality: A Synthesis of Climate Change Impacts on Ground-Level Ozone,” for example, suggest that climate change may lead to higher concentrations of ground-level ozone, a harmful pollutant.

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CRC ACES Phase 2 report finds emissions from modern heavy-duty diesels well below required levels

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ACES is a multi-party five year initiative to test the emissions and health effects of new technology diesel engines to document the improvements that have been made and to ensure that there are no unintended emissions from this new technology. All emissions characterization for ACES is being overseen by CRC. Background. g/hp-hr in 2010.

Diesel 296
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California ARB and NOAA Collaborating in $20M Research on Interaction of Air Pollution and Climate Change; One Atmosphere Approach

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These connections arise because in many cases the agents of concern are the same, and in many cases the sources of the agents are the same or intimately connected.For example, surface ozone is both an air pollutant and a greenhouse gas. The complex roles that ozone and aerosols play in the atmosphere provide examples of such trade-offs.

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UC Davis Begins $2.8M Studies on Impacts of Escaped Nitrogen

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These environmental impacts are not fully documented, according to Tom Tomich, director of the Agricultural Sustainability Institute at UC Davis. With this new funding, we can start to fill in those blanks, and improve management of nitrogen, carbon and water to help move agriculture toward sustainability in significant ways.

Davis 240
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CRC Releases Summary of Status of 8 Projects Investigating Effects of Mid-Level Ethanol Blends on Non-FFV Highway Vehicles

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Testing is due to be complete next year, prompting the auto, oil and outdoor power equipment industries to urge the Environmental Protection Agency (EPA) to delay action on its proposal to allow higher levels of ethanol in gasoline until that testing is done. Earlier post.) Base engine durability (CRC CM-136-09). A-67 / A-73).

Vehicles 186