It's not that bad actually..Obviously I have noticed the difference over the years with population levels and smoke pollution but only really around the Sessions Road area.. Not really my favourite part of Baguio anyway.
We were in Baguio last year and were walking a good 10 KM a day mostly Uphill!! Easy to do there because of the climate..
In Cebu I walk about 5 mins and its time for a cold SMB in a cold bar with my feet covered in soot.