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The article explains why the air filters were installed, and it doesn't fit your supposition.
by Someone1234 7y ago
The article explains why the air filters were installed, and it doesn't fit your supposition.
- gfody 7y agoagree, I actually expect there to be all sorts of positive correlations with clean air - but they all start with caring about it enough to do something like change a filter
- lalaland1125 7y agogfody, the schools had no choice about changing their filter or not. In fact, the whole premise of the study relies upon that fact!
- gfody 7y agogood point, crucial even.. thank you I should get back to work :)