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At the high temperatures in internal combustion engines, some of the nitrogen in the air actually burns, resulting in the formation NO or NO 2 , which are collectively called NOx. NOx plays a role in forming groundlevelozone and final particulates (PM2.5), both of which are human health hazards. gpm NOx standard.
Earlier this month, the Environmental Protection Agency’s (EPA) CleanAir Scientific Advisory Committee (CASAC) released a draft set of recommendations calling on the EPA to tighten its current standard for ground-levelozone pollution to protect public health. But will the EPA follow CASAC’s recommendations?
Methane also contributes to the formation of ground-levelozone which is itself a heat-trapping greenhouse gas and, when inhaled by humans, can trigger a variety of health problems from throat irritation and coughing to bronchitis, asthma, and reduced lung function.
In 2017, Hurricane Harvey —one of the worst—drenched Houston with more than 4 feet of rain, killed at least 88 people, and caused $125 billion in damage. EPA decision , upheld the EPA’s authority to regulate such emissions under the CleanAirAct but significantly constrained its ability to do so.
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