Usually there is not room in the soil (pipes etc), and asphalt/concrete prevent a tree to get water.
Also trees evolved to live in an ecosystem. A city is not an ecosystem.
And there also are roofs and walls and roads, so tree will just mitigate the problem.
It's feasible, but the cost is high, and it also implies giving up car space.
A city is an ecosystem, and we desperately need to treat them as one rather than try an obliterate all signed of none human life.
> not room in the soil
Not true in any sense, yes there are services under the ground but that is a tiny amount of usage. Roots can cause problems for hard surfaces, but the answers to that is more turf and planting, exactly as the article is proposing.
> also implies giving up car space.
Also only a good outcome, we need less cars stationary on streets using up valuable space.
Mature trees are also simply expensive by itself, as they require many years to grow. They are expensive to transport, and the transplant frequently fails to take hold, requiring buying another expensive tree, digging up the previous one and replacing it. This makes planting mature tree cost tens of thousands of dollars, compared to tens of dollars for planting saplings.
Maybe this is the problem. Humans like to pretend we are separate from the environment rather than a part of it, and the consequences of this lunacy are felt in every aspect of our lives, always to the negative.
LA: https://goo.gl/maps/4XzjwTJ3xS438izu5
Sacramento: https://goo.gl/maps/5QVxr3nzwa6cmd5TA
Brooklyn: https://goo.gl/maps/bwqb8ekAiWCsL1Ai6
Washington D.C.: https://goo.gl/maps/AYmNQAErn6h8yKco6
Houston: https://goo.gl/maps/6BMiFgyWv1ZM1HqV9
You just need to do it. Some is better than none and you need some to have more.