Helio da Silva, creator of the Tiquatira Linear Park Engineer Werner Eugęnio Zulauf, plants a tree at the park, in Sao Paulo, Brazil, on September 4, 2024. In little more than two decades, Helio da Silva has planted more than 40,000 trees -160 different species- in the 3.2 kilometre long and about 100 metres wide plot of land amid the concrete in Sao Paulo, a green gift to the megalopolis in times of climate crisis. (Photo by Nelson ALMEIDA / AFP)