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    Home»Science»New study finds that natural gas leaked from interstate pipelines
    Science

    New study finds that natural gas leaked from interstate pipelines

    By AdminOctober 22, 2022
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    Credit: Pixabay/CC0 Public Domain

    Natural gas transported by interstate pipelines contains hazardous air pollutants and known human carcinogens, according to a first of its kind study published in Environmental Research Letters by researchers at the nonprofit research institute PSE Healthy Energy.

    In the United States, interstate transmission pipelines that transport natural gas release significant quantities of unburned gas during routine operations and unintentional leaks (e.g., blowdowns and blowouts). In 2020 alone, the Environmental Protection Agency estimated that natural gas transmission infrastructure leaked over 1.4 million tons of methane—a potent greenhouse gas. Despite this, no previous analysis has evaluated whether the gas in this system contains hazardous air pollutants.

    “Interstate natural gas pipelines are critical energy infrastructure that is normally off limits to researchers,” said the study’s leading author Curtis Nordgaard, an environmental health scientist at PSE Healthy Energy and a board-certified pediatrician. “This is the first study to investigate the chemicals moving through our nation’s vast natural gas transmission network. Our results indicate that there are surprising levels of harmful air pollutants and carcinogens, creating potential health risks if gas leaks into nearby communities.”

    Using industry-reported data from infrastructure applications submitted to federal regulators, PSE scientists calculated the concentration of hazardous air pollutants in natural gas transmission pipelines. The researchers found BTEX (benzene, toluene, ethylbenzene, and xylenes) and hexane reported in nearly all filings that disclosed hazardous air pollutant data.

    Industry reports also included other health-damaging compounds, including mercury, the radioactive gas radon, and hydrogen sulfide. While concentrations of these chemicals varied, some were health-relevant. In the case of benzene, concentrations were reported as high as 299 parts per million, or 30,000 times the short-term exposure level considered low-risk by the California Environmental Protection Agency. Many of the chemicals reported are known to cause neurodevelopmental impairments, lung cancer, leukemia, and respiratory illness.

    “We know that natural gas transmission infrastructure is responsible for methane emissions that damage the climate. This new study indicates that these leaks may also contain chemicals that are dangerous for human health,” said PSE Healthy Energy Executive Director Seth B.C. Shonkoff. “Stopping natural gas leaks is critical for the climate and to protect the health of our communities.”

    The researchers used industry-reported data from natural gas infrastructure expansion applications approved by the Federal Energy Regulatory Commission (FERC) between 2017-2020 and ongoing industry measurements reported for five interstate pipelines from December 2020 through June 2021.

    Because the industry is not strictly required to report the presence of hazardous air pollutants in expansion applications, over 50% of applications did not report any hazardous pollutant data. The pipelines evaluated represent 45% of all onshore natural gas transmission systems by mileage.

    Natural gas used in homes contains hazardous air pollutants, shows Boston-area study More information: Curtis L. Nordgaard et al, Hazardous air pollutants in transmission pipeline natural gas: An analytic assessment, Environmental Research Letters (2022). DOI: 10.1088/1748-9326/ac9295

    Provided by PSE Healthy Energy

    Citation: New study finds that natural gas leaked from interstate pipelines contains hazardous air pollutants and carcinogens (2022, September 20) retrieved 22 October 2022 from https://phys.org/news/2022-09-natural-gas-leaked-interstate-pipelines.html

    This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.

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