EPA tightens ground-level ozone standard to 70 ppb

Green Car Congress
By mmillikinOct 1, 2015, 4:18 pm85 pts
The US Environmental Protection Agency (EPA) issued its final rule revising the National Ambient Air Quality Standards (NAAQS) for ground-level ozone to 70 parts per billion (ppb) from 75 ppb to protect public health. Ground-level ozone forms when nitrogen oxides (NOx) and volatile organic compounds (VOCs)…

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