As winters warm, fields left fallow are becoming a major source of greenhouse gas emissions
National Observer reports: Each September, Ashala Daniel sows her fields with winter rye, hoping the seed takes root before the first snows fall. It’s a ritual that could help save the planet. Fields are among Canada’s largest emitters of agricultural greenhouse gases (GHGs), emissions that are at their highest levels in winter. During the freeze-thaw cycle, increased levels of nitrous oxide (N2O) and methane, both potent GHGs, are pumped from barren fields into the atmosphere. The natural phenomenon is expected…