AllAfrica: Ensuring food security is one of the most pressing challenges in Africa, which is increasingly losing ground as a result of challenges from climate change to land degradation, the top United Nations environment official today said, urging a stronger emphasis on the continent's transition to a 'green economy.' "From plugging into solar power in Algeria and Tunisia to investing in green funds in South Africa, diverse pathways to greener and more-inclusive economies are being pursued across the continent,"...