Browsing All posts tagged under »air quality«

Lichens point to cleaner air quality

July 26, 2011

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Saint John’s air is getting cleaner, according to the crusty, green vegetation that dots tree trunks around the city. Stephen Clayden, the head of botany and mycology (the study of fungus) at the New Brunswick Museum, has been researching how tree lichens can tip off changes in air quality. He’s found evidence that there is […]