CNN Opinion columnist John D. Sutter is reporting on a tiny number -- 2 degrees -- that may have a huge effect on the future. You can subscribe to the "2 degrees" newsletter or follow him on Facebook, Twitter and Instagram. He's jdsutter on Snapchat. You can shape this coverage.
Le Bourget, France (CNN)Constance Okollet, a farmer and mother of seven from eastern Uganda, remembers a time when there were two seasons in her village.