When we compare the Koppen World Climate Classification Map with the map showing cities and population, we get a picture of those climatic regions where building activity is most evident today and where it will expand in the coming years.
The map of CO2 emissions shows that today the developed nations contribute the major share of CO2 emissions due to consumption of fossil fuels. Whereas the destruction of forests is chiefly responsible for CO2 emissions from the developing countries. It also shows that urban and industrial centers of developed countries emit the highest concentration of CO2. This is an indication of the correlation between urban/industrial life and CO2 emissions. If the present modes of urbanization and building construction continue to be adopted in the urbanization of the developing countries, then we would see a drastic increase in CO2 emission worldwide.