Xochimilco, Mexico City – Pedro Capultitla remembers when he was a child, running through his family’s black pastures, a string in hand and a kite gliding above. Canals, canoes and native flora ...

In Mexico City, a 700-year-old Aztec farming technique is giving a sustainable edge to modern agriculture. It was early on a Sunday morning, and I was in the Floating Gardens of Xochimilco, 28km south ...

Five hundred years on, it still takes a canoe to reach the fields that fed this city when it ruled a great empire. On the map, Xochimilco's gardens are a tiny wedge of green in the southern reach of ...