Bob Warrington: Controlled burns protect Vermont’s air

Dear Editor,The smoke-filled, unhealthy air quality last summer reminded us all again how wildfires out West and in Canada still affect us here in Vermont. Beyond our exposure to smoke and particulate matter, the massive amounts of carbon dioxide released further stoke global warming and increase the likelihood of more wildfires.Risk of severe forest fires centers on the density and dryness of the trees, shrubs, grasses and forest debris that act as fuel. 
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