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How do trees grow in such tiny areas of earth in city sidewalks? One wonders where the roots go beneath the concrete. When work crews dig up the road to get to water lines and sewer pipes and the whole subterranean infrastructure one never sees the roots of adjacent trees. And how, in very old cities, built on the ruins of previous establishments do the trees find space to grow, and where does the water they need come from. It’s all a mystery to me.