How Climate Change is Impacting Thoreau’s Walden Pond
Walden, where Henry David Thoreau planted beans on land that had yielded only cinquefoil, blackberries, johnswort and sweet wild fruits, is changing.
Caroline Polgar, a student at Boston University, decided to repeat his observations. What she found was surprising: “all species—no exceptions—are leafing out earlier now than they did in Thoreau’s time. On average, woody plants in Concord leaf out 18 days earlier now.”