They’re called trees, and they have 350 million years experience looking after our planet. Luckily, when modern cities started to form someone had the clever idea of planting trees there too, so we could enjoy the benefits they bring even in our urban communities. And our urban trees are pretty amazing. Not only do they provide a source of beauty and interest in the otherwise bleak urban landscape, they have crucial environmental benefits and give all us city-dwellers a place to relax, away from the stresses and strains of everyday life.