The new study contradicts the results of one published last year by CDPHE, which found little evidence of health harms from living near oil and gas sites. That study found that lifetime cancer risk was not increased near wells due to exposure to benzene or other chemicals. Lisa McKenzie, a professor at the School of Public Health and the paper’s lead author, said her study used California guidelines for assessing benzene toxicity, which are stricter than the guidelines used in the CDPHE study. She said her study also incorporates newer research.
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