Science Not Settled: Pollutants Down But Ozone Up In B.C.

The key air pollutants that combine to cause smog have dropped due to emissions regulations but baseline levels of ozone are continuing to creep up in the Lower Mainland of British Columbia.Scientists from the University of British Columbia, along with state and environmental groups, are trying to figure out why average levels of ground-level ozone haven't dropped with emissions over the last decade and have instead gone up. A new report from Metro Vancouver shows ambient levels of fine particulate matter, like sulphur dioxide, nitrogen dioxide and carbon monoxide, have declined by 20 to 60 percent since 2001, but ozone has continued to rise in that same period, up 20 percent.  read more

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