by Menna Zaki Agence France Presse Demokaya, Sudan (AFP) — A vast belt of trees vital for global production of fizzy drinks helps Sudanese farmers adapt to climate change, but in the harsh drylands many are reluctant to take up the trade. Gum arabic, golden blobs of resin tapped from thorny acacia trees, is an emulsifying agent virtually irreplaceable for global industry. The ingredient is used in everything from soft drinks to chewing gum and […]