SINGAPORE — On a vast plateau atop Jingmai Mountain in Yunnan, China, nearly a mile above sea level, grows a forest of ancient tea trees. During summer, silvery cobwebs line the gnarled specimens, some of which are more than 200 years old and up to 8 meters (26 feet) tall. Workers perch on their branches, … Continue reading In China, agroforestry serves up tea with a spoonful of sustainability