Climate change is leaving a mark on one of New Hampshire's springtime rituals: maple sugaring.
Scientists and farmers dug into the latest research over pancakes in Plymouth on Tuesday.
Mount Washington Observatory research director Eric Kelsey says maple trees face a lot of stresses: abnormal storms, droughts, excess road salt, acid rain and new pests.
"And that might explain the general 25 percent decrease in sap-sugar content we've seen over the last 40 to 50 years,” Kelsey says.