IPS: Mesfin Mengistu has been growing trees on his two-hectare farm in Menagesha Woreda for years. “I understand planting trees helps maintain environmental balance, but I do it to earn extra income to cover the rising cost of fertilisers,” Mesfin said. Wheat and maize are his main sources of income from his plot 45 kilometres west of Ethiopia’s capital Addis Ababa. In the last year, he has earned 10,000 birr (over $730) from his trees alone, an income most Ethiopian families would …