Comment Plant trees, not airco's (Score 1) 268
Cooling a poorly isolated building with airco just transforms all the electricity into heat making the city even hotter.
With the rise of the living standards, someone buys a cheap airco. The airco lowers the temperature inside the house, and heats up the temperature outside the house. This hotter environment pushes all their neighbors to also buy airco's. This raises the city temperature even more, and makes the airco pumps work harder to fight the higher outside temperature.
To fight this heat island effect, cities and home owners must plant trees. Trees provide shade and cool the city by evaporation. They also give oxygen and capture CO2, a relieve from woodfire cooking and old cars/mopeds too dirty to be allowed in western countries, so exported to developing countries. In the Netherlands they are promoting micro forests in cities, a small forest even as small as 10 x 10 m.