![](https://cleanairplan.ca/blog/wp-content/uploads/2021/08/PM_avg092020.jpg)
Charts for historical values of PM2.5 in the RDBN (Burns Lake)
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This is a great report prepared by Dave Stevens on August 20, 21.
![](https://cleanairplan.ca/blog/wp-content/uploads/2021/08/PM_avg092020.jpg)
If it weren’t for the wildfires we would have a downward trend!
Highlights:
Data analysis and interpretation are not value-free actions.
The purpose of computation is insight, not numbers.
Assessing human health impacts on an annual average basis is a mistaken approach.
Adverse health effects are caused by extreme values, no-one can breathe an average.
The word standard is ambiguous. It may be either descriptive or prescriptive.
For the full report:
![](https://cleanairplan.ca/blog/wp-content/uploads/2021/02/woodstove2-75x75.jpg)
![](https://cleanairplan.ca/blog/wp-content/uploads/2021/06/ashvac-75x75.jpg)