Cities have too much thermal mass exposed to the Sun, that's is. As a result they makes heat domes between buildings and you can't reduce much the thermal mass

Cities have too much thermal mass exposed to the Sun, that's is. As a result they makes heat domes between buildings and you can't reduce much the thermal mass with trees because you still have all the buildings. A solution is new buildings "coated" with light air-gapped panels where air between them and the core structure of the building is free to slowly climb and going outside in the atmosphere. Of course you can't do so on glass facade walls. And it's hard to do on most existing buildings. Also you can't do much for the large asphalted area. Like it or not, cities and global heating are incompatible, as cities and many other aspects of the modernity.