A worker prepares planting bags for seedling plants, to be used for urban forest projects, at the Sindh Forestry Public Nursery in Karachi, Pakistan May 25, 2021. Karachi is a sprawling port city of some 17 million people, where breakneck expansion of roads and buildings means there is less and less space for trees and parkland. REUTERS/Akhtar Soomro SEARCH "SOOMRO PAKISTAN FOREST" FOR THIS STORY. SEARCH "WIDER IMAGE" FOR ALL STORIES.