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California adopts comprehensive strategy to meet federal ozone standard over next 15 years

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The California Air Resources Board today approved a statewide plan for attaining the federal health-based standard for ozone, typically experienced as smog. The 2022 State Implementation Plan Strategy identifies the state’s control strategy for meeting the federal 70 parts per billion, 8-hour ozone standard over the next 15 years.

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Fraunhofer IFF team designing hydrogen factory of the future

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Electricity sourced from sun and wind is used to split water into hydrogen and oxygen in a process called electrolysis. It is not possible to build wind and PV plants everywhere. Micropollutants such as pharmaceuticals, pesticides and cosmetics can be removed from wastewater when ozone is introduced.

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EPA Climate Change Adaptation Plan sees likely increase in tropospheric ozone, with more difficulty in attaining NAAQS in many areas

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Among the many climate-related vulnerabilities that can impact its mission, the US Environmental Protection Agency (EPA) cites a likely increase in tropospheric ozone pollution as potentially making it more difficult to attain National Ambient Air Quality Standards ( NAAQS ) in many areas with existing ozone problems.

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Researchers Discover New Chemistry for Ozone Formation; Not Yet Monitored or Incorporated into Atmospheric Models

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A) shows the base case peak concentrations for O 3 (ozone), ClNO and HCl in parts-per-billion by volume (ppbv). (B) Under extreme circumstances, this previously unknown chemistry could account for up to 40 parts per billion (ppb) of ozone; the current US Environmental Protection Agency (EPA) 8-hour average standard is 75 ppb.

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Study: Urban grime releases NOx when exposed to sunlight

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Researchers at the University of Toronto have found that natural sunlight triggers the release of smog-forming NO x compounds from the grime that typically coats buildings, statues and other outdoor surfaces in urban areas. Among these compounds are nitrogen oxides. —James Donaldson.

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Test of Planet-Cooling Scheme Could Start in 2022

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Up there, 10 to 50 kilometers above the Earth’s surface, ozone molecules absorb the sun’s ultraviolet light, protecting life far below. Even less is understood about the potential risks to people and the environment—could the particles deplete the ozone layer, for example, or significantly alter the weather? about 0.6 °C.

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EPA Administrator Outlines Seven Key Themes for Agency in 2010 and Beyond

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In all of this, we must also recognize that climate change will affect other parts of our core mission, such as protecting air and water quality, and we must include those considerations in our future plans. Improved monitoring, permitting and enforcement will be critical building blocks for air quality improvement.

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