According to an article in Weeds Science this month, the scorn of every outdoorsman, poison ivy, is becoming more problematic as carbon dioxide levels climb. While a number of critics cite rampant global warming trends, Brookline poison ivy specialist Jonathan Sachs dismisses those theories. Sachs rationalizes that poison ivy has always been a problem — everywhere from the generally colder Canada to temperate New England to the Southern United States. Sachs attributes the poison ivy problem on the jump in CO2 levels over the last fifty years.

Sachs, who manages a website devoted to the tricky weed, says he’s been fascinated at how poison ivy has become somewhat of a “smoking gun,” over the last half-century.

Visit Jonathan Sachs's website, www.poison-ivy.org