Industry cries foul on ozone rule
Industry groups blasted a move by US regulators to lower the standard for ground-level ozone to 70 parts per billion (ppb) from 75 ppb, saying the move would be costly and had little benefit for public health.
Industry groups blasted a move by US regulators to lower the standard for ground-level ozone to 70 parts per billion (ppb) from 75 ppb, saying the move would be costly and had little benefit for public health.