Briefing on the legality of the Environmental Protection Agency's national ozone standards issued in 2015 will begin in April and continue through the summer of 2016. The ozone standards are being challenged by states, industry organizations and environmental groups. EPA Administrator Gina McCarthy in October issued her decision (RIN 2060-AP38) to revise the 2008 ozone standards of 75 parts per billion, set under former President George W. Bush, to a level of 70 ppb. Litigation over the standards is expected to focus on the health effects and attainability of the new ozone standards.
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机译：关于环境保护署于2015年发布的国家臭氧标准的合法性的简报将于4月开始，一直持续到2016年夏季。各州，行业组织和环保组织都在挑战臭氧标准。 EPA负责人吉娜·麦卡锡（Gina McCarthy）于10月发布了决定（RIN 2060-AP38），将前总统乔治·W·布什（George W. Bush）制定的2008年臭氧标准（十亿分之75）修订为70 ppb。预计有关标准的诉讼将集中于新的臭氧标准对健康的影响和可达到性。
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